①の式になる理由がよくわかりません 二つの方程式も満たすなら連立方程式じゃないですか？

Link 研究 2直線の交点を通る直線の方程式 考察 2直線 x+2y-4=0, x-y-1=0 は1点で交わる。 その交点Aを 通る直線の方程式について, 考えてみよう。 2直線の交点Aの座標を (x, y) とすると,(x, y) は YA 5 x+2y-4=0 かつ x-y-1=0 x-y-1=0 を満たすから,kを定数とするとき, 2 方程式 k(x+2y-4)+(x-y-1)=0 A 0 1 4 ① -1 x x+2y-4=0 5

There is now evidence that humans may also possess a sixth sense — or an intuition about people or events. この文で使われているthatは接続詞ですか？

数Ⅱ黄チャート　高次方程式 基本例題62を別解2の方法で解かなきゃいけないんですけど、解き方を忘れてしまったので、解説お願いします🙇

104 基本 例題 62 解から係数決定 (虚数解) 00000 3次方程式 x+ax²+bx+10=0 の1つの解がx=2+i であるとき, 実数 の定数α, bの値と他の解を求めよ。 (山梨学院大 p.98 基本事項2.基本61 解 CHART & SOLUTION x=αがf(x)=0の解⇔f(α) = 0 代入する解は1個(x=2+i) で, 求める値は2個 (αとb) であるが, 複素数の相等 A, B が実数のとき A+Bi=0 A = 0 かつ B=0 により,a,bに関する方程式は2つできるから, a,bの値を求めることができる。 また,実数を係数とするn次方程式が虚数解αをもつとき,共役な複素数も解であるこ とを用いて,次のように解いてもよい。 別解 2αとが解であるから, 方程式の左辺は (x-α)(x-2) すなわち x-(a+α)x+a で割り切れることを利用する。 別解 3 3つ目の解をkとして, 3次方程式の解と係数の関係を利用する。 x=2+iがこの方程式の解であるから ここで, (2+i=2°+3・2'i+3.2i+i=2+11i, (2+i)+α(2+i)+6(2+i) +10=0 (2+i)=22+2・2i+i=3+4i であるから 2+11i+α(3+4i)+6(2+i) +10=0 iについて整理すると 3a+26+12,4α+6+11 は実数であるから 3a+26+12+(4a+6+11)i = 0 3a+2b+12=0, 4a+b+11=0 これを解いて a=-2,b=-3 ゆえに、方程式は x-2x2-3x+10=0 f(x)=x-2x2-3x +10 とすると f(-2)=(-2)-2-(-2)2-3-(-2)+10=0 よって, f(x) は x+2 を因数にもつから f(x)=(x+2)(x²-4x+5) したがって, 方程式は (x+2)(x-4x+5)=0 x+2=0 または x2-4x+5=0 x2-4x+5=0 を解くと x=2±i よって, 他の解は x=-2, 2-i 別解 1 実数を係数とする3次方程式が虚数解 2+i をもつ から,共役な複素数 2-iもこの方程式の解である。 よって,x+ax²+bx +10 は{x-(2+i)}{x-(2-i)} すなわち x4x+5で割り切れる。 mfx-2=i と変形して 両辺を2乗すると x2-4x+5=0 これを利用して x+ax²+bx+10の次数を 下げる方法 (別解 1の3行 目以降と同じ) もある。 (p.93 基本例題 55 参照) この断り書きは重要。 A, B が実数のとき A+Bi=0 ⇔ A=0 かつ B=0 ← 組立除法 1-2-3 10-2 -2 8-10 1-4 50 の部分の断り書きは 重要。

これにS(主語),V(動詞)をつけてくれませんか😭😭

16 D 15 2 of 900 woyob woH Moli linakalipid or ou Some parents do not like the idea of But in fact, pets may be good for Many children want to have a pet. having a dog or a cat in the house. children. A pet is something to play with. So keeping a pet can be especially important if there is only one child in the family. Also, children can learn a lot of things from a pet. They can learn about animals and the natural world. Children are also able to learn about taking care of a living creature. They have to learn to look after their pets in their daily life. This is an important experience for all children. stil ylish Cats and dogs are both popular pets. To tell the truth, I think cats are better for several reasons. First, cats are cleaner than dogs. They clean and they will not make the house dirty. Second, cats are safer. I junde bey stay very 10 Dogs sometimes bite people, but cats almost never do. And finally, cats are easier een to take care of. You do not have to spend much time with a cat, because many cats like to be left alone. What do you think? es/Tokyo/been/many/to/have). TERES

これにS(主語),V(動詞)をつけてくれませんか。😭😭

READING Tly man 西洋の玄関ドアと日本の玄関ドアの違いは? CD1 11~13 13 11 I have been interested in doors for many years. 12 The front doors in Western countries open inward. But in Japan most of them open outward. Why do Japanese doors open outward and Western doors open inward? Have you ever thought about this? invite A young Japanese architect gave me an interesting answer to this 5 question. He said, "In Western countries, people open the doors inward to ite others into their houses. When you open the door outward, visitors many years we na have been have to move away from the door. In Japan, for using sliding doors. Even now, many old Japanese houses still have sliding front doors. When we started to use Western doors in Japan, we had to open 10 ebem blog 01, djiw Snow, them outward. You know, in Japan we take off our shoes when we go into our houses. If we try to open the front door inward, what will happen to all those shoes? We open the door outward to make a place for our shoes." Our way of living has changed the doors in Japan. They are only doors, but they are part of Japanese culture. Us 15 918 y9dT (t)

ベン図の色を塗るところを教えて欲しいです

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なぜこの答えなのかほかの答えではダメなのか教えてください。お願いします🙇‍♀️

Select the best answer to complete the sentence. Then choose the letter (A), (B), (C), art 1. Before --- ------ (A) enter 2. He ------- Japan, all international students must get a student visa. (B) entering (C) to enter (D) have entered in psychology in university, but now he is an artist. (A) majored (B) studied 3. Mr. Toda helped Cathy describe (A) hers (B) she (C) researched (D) took research plan. her (D) herself

この英文の添削をお願いします🙇

Expressing Post-reading Activity Express your opinions on one of the following questions in more than 50 words. Questions A. Which do you think is better, living with only a few things or with a lot of things? B. Where can you find an example of the "less is more" principle around you? C. Any other ideas? Expressions 【比較する】 Compared to ~,... (~と比べると...) ~ is similar to ... (~は...と類似している) For me, ~ is better. (私にとっては〜のほうがよりよい) 心を整えることができる。 I think living with only a few things is better. There are some benefit from organized. get unnecessary information and reduce our stress. Study work and so on room. First, because we, will not Second, we can concentrate on we can prepare our mind ¥30 compared to live with To live with a lot of lot, things. Moreover, motivation for them increases. Third, can be expected good luck. Someone understand It can "60" these benefit, but they cannot arrange the room member of them. However, I'm a our behavior can change from a small action. We will be happier if we can change

この解答であっているのかそしてなぜほかの答えではだめなのか教えて頂きたいです。

Part 5 Daily Life Incomplete Sentences Select the best answer to complete the sentence. Then choose the letter (A), (B), (C), or (D). 1. All participants have to arrive ten minutes before ------- scheduled appointments. (A) they (B) their (C) them (D) themselves 2. At the book reading workshop, authors read books ------- to children. Text Completion Select the best answer to complete the text. Then choose the letter (A), (B), (C), or (D). Questions 9-12 refer to the following notice. Security Notice by Artist Request The use of cellphones, cameras, smart watches or recording devices will not be permitted during tonight's performance. Guests are encouraged to leave these items in their home or vehicle to entry. Failure to comply with this ------ your 11. 9. policy will result in ---- from the venue without a refund. We greatly. 10. (A) fully (B) aloud 3. We are pleased to (A) welcoming (C) noisy (D) over ------- a new exchange student from Canada. (B) welcome (C) welcomed (D) welcomes 4. Use this robot vacuum cleaner after reading the ------- carefully.A.2 (A) systems 5. The order can -------- (A) ships (B) policies anywhere in the world. (B) to ship (C) applications (C) be shipping (D) be shipped 6. Steven began a bakery more than 20 years ------- (A) last (B) ago (C) past cooperation in creating a phone-free viewing experience. ------ 12. Thank you for your understanding. Central Theater directions A 9. (A) once (B) when (C) advance (D) prior (D) before 10. (A) remove 11. (A) anticipate (B) removing (C) removal (D) removed (B) acknowledge (C) acquire (D) appreciate 12. (A (D) automate Further details about this policy can be found on our website. (B) Come celebrate our 25th anniversary this Saturday from 5:00 P.M. (C) For information on group rates and private events, check online. (D) Check for details to see if you qualify for exclusion to this rule. 7. The air conditioner we bought was designed to turn off -------. (A) automatic (B) automatically (C) automated 8. The Momo Store also has small items you can ------- as souvenirs. (A) replace (B) borrow purchase (D) sell

この選択であっているのかそしてなぜほかの答えではダメなのか教えていただきたいです。

Education Text Completion Select the best answer to complete the text. Then choose the letter (A), (B), (C), or (D). Questions 9-12 refer to the following web page. Part 5 Incomplete Sentences Select the best answer to complete the sentence. Then choose the letter (A), (B), (C), or (D). 1. Before ------- Japan, all international students must get a student visa. (A) enter (B) entering (C) to enter (D) have entered ------- in psychology in university, but now he is an artist. 2. He A majored (A) hers (B) studied (B) she 3. Mr. Toda helped Cathy describe 4. It has been 15 years since I graduated (A) on (B) in 5. Library accounts are automatically created, so no ------- LVU Campus Tours The students of Las Vegas University are at the heart of the LVU experience, 9. tour our campus, meet LVU students, and have them guide you on a campus tour. You can enjoy a candid conversation with 10. students, ask them about classes, housing, Las Vegas, online student support, and more. 11. Doing this will hopefully give you the best idea of what LVU life would be like for you. The two-hour campus tour allows you to experience firsthand everything you need to know. Click here for your guided tour. (C) researched (D) took research plan. (C) her (D) herself ------- university. (C) at (D) from registration is 9. (A) so 10. (A) now (B) then (B) modern (C) initials (D) initialed 12. (C) also (C) latest (D) and (D) current necessary. (A) initially (B) initial 6. I'm happy to have this ------- to study with such great professors. (A) notice (B) benefit (C) factor 7. Statistics is a ------- class for second-year students. (A) require (B) required (C) requiring 8. The geologists plan to study the soil from the mountains Dopportunity (D) requires ------- Canberra. 11. A We will match you with a guide based on your interests and goals. (B) Feel free to ask about other universities found in the area. (C) Take the time to learn more about the city of Las Vegas online. (D) Please let us know the kind of person you were in high school. 12. (A) arrange (B) to arrange Carranging (D) arrangement (A) out (B) next (C) onto (D) around