問題の解き方を教えてください！！まだ習ってない範囲なので、分からないです💦 問 x=√５＋2, ｙ=√５－2のとき、次の式の値を求めなさい。 （1）（x＋ｙ）² （2）xｙ （3）x²－ｙ² 答えは、上から、20、1、8√５なのですが、解き方が分かりません

(3)がわからないので教えていただきたいです。

回 Fillinthe blanks ie sxpress the meaning on the right. [①Dー⑨一ゆ, の9ー⑥ーづ] ①⑪【 ( ) we ( ) depend less on electricity in our lives. 〔【てできればいいのに〕 ⑫)出師( )gL( )M ) for a haircut last week. 【散髪に行っておけばよかった (3) My father talked about Egypt as if he ( )( ) there. (行ったことがあるかのように] (④⑭ If you ( ) (( ) sick, push this button to call the staff. 【万ーー感じたら ⑮) If you ( ) ( ) travel back in time, what century would you go to? 〔仮にこするとしたら] (⑥) I really feel that our Iives would be boring ( )ji( ). 【音楽がなければ

数二の予習をしているのですが、分かりませんでした。教えていただけると嬉しいです🙏

』 2 _ 2 ' 7 記=9g 人征田せよ。 D 5 た) し で2和9 旨半0 7 る

英語の訳をお願いします。あと、よろしければ単語の訳もお願いします！今同時並行でやっているのですが、良い訳ができません。

10 15 Positively (negatively) charged : 正 (負 ) 因で besaid to 一 : ーする・一であると言われている When you rub a plastic ruler on your head!, your hair sticks to the ruler. This happens because of static electricity. The plastic ruler has equal numbers of positive and negative charges before it is rubbed. These charges balance each other. It is said to be electrically neutral. However, rubbing it upsets this balance. When the ruler is rubbed against your har, negative charges travel from the hair to the ruler. The ruler now has more negative charges than positive charges. It has become negatively charged. Because the negative charges have left the hanr, it now has more pos1tive charges than negative charges. It has become positively charged. Such an imbalance of electric charges is called static electricty. ほしている because of 一 ・ のために・一が全 5 2-01-04 electric [ilCktrik] charge [UIG:7d53] rub [rAb] ruler [ru:ls/ stick [Stik] static [stietik] electricitY [ilektrisati] balance [blans] electrically [ilektrikali] neutral [n/u:tral] upSet [ADSCt] negatively [negstivli] positively [pezitivli] imbalance [imbslsns]

教えてください🙏🏻

C同 <+5=ニ10, のの=ニ7のこき, の十3g6+/ の値を求めなさい。

explains what Economics is about, how economists study economies, and how economics affects the world. Economists study the choices made ... Read More

(2)で2d-a が8の倍数であるのはどうしてですか？

(ヵ進法と数字の並び ある月然数を8 途法で表すと 2525。 に 誠 ある月鈴数とその 2 倍の数をそれぞれ8 なっでいるという。このようみか自然数をす. ー 固 basic p.87 例題22 人なる。みの2 倍を8 進法で表せ。 間湊で表したとき。 ともに4桁で. 数字の並び方は迎に べて求め、 それらを 8 進法で表せ。 (本大大)

カッコに入る一語を教えてください❗️ These electric appliances will be available for 10 percent ( ）the regular price.

RHEED法の原理と得られる7つの情報が、この英文に書かれているみたいなのですが、よく分かりません。 分かる方助けてください！🙇‍♂️

INTRODUCTION Reection high-energy electron diHiraction (RHEED) uses a Rnely collimated electron beam with energy of 10-100 keV. The beam irradiates a sample surface with gazing incidence to obtain forward scattered difraction patterms. RHEED enables us to analyze structures of crystal surfaces at atomic levels and also to in situ monitor growth processes of thin films (mo、1988: Ichimiya and Cohen、2004: Peng et al.. 2011). From the arrangement。intensity and profile of the dilraction spots in RHEED patterns as described below in detail、 one can obtain various kinds of information: (1) the periodicity (unit cells) in atomic arrangements. (2) flat- ness of surfaces. (3) sizes of grains/domains of surface structures and microcrystals grown on the surface. (3) epitaxial relation between the grown flms/islands with respect to the substrate. (5) parameters character- izing structural phase transitions. (6) individual atomic positions in the unit cells. and (7) growth styles of thin films and numbers of atomic layers grown. The most important advantages of the method are that it is quite easy to install the RHEED apparatus in Yarious types of vacuum chambers without interfering with other components of apparatuses and to do real- time monitoring during thin-Rlm growths. Because of these advantages.RHEED is nowwidelyusednotonlyin research Iabs of surfaces and thin fims. but also in device production processes in industry Low-energy electron diiraction (LEED、see article Low-ENNERcy ErecroN DirscmoN)。 in which an electron beam of 10-100 eV in energy is irradiated onto a sample surface with nearly normal incidence to obtain back- scattered difraction patterns. is also widely used to analyze the atomic structures of crystal surfaces. Since one has to make the sample face directly to the LEED

答え合わせをお願いできませんでしょうか。

Practice Quiz 次の文を読んで、一番適当と思われる語を入れましょう。 | 6 7ウド Dad ------- me a brand new bicycle. a. obtained (⑯) bought c. paid We 。 Frank 一- me Some advice. a. put ⑯ gave Cc. took d. said る胸い- に99S 3 >aggressively d. wisdom