なぜ、アメリカを指すグラフが3番なのか、教えてください！🙏🙏

馬 ロシアの主な国との貿易 次の図は。ロンァと 億Fル いくつかの国との輸出入額の変化を示したものであり. 0-0⑩はアメリカ合衆国,オランダ、ドイツ, プラジ 600| ルのいずれかである。アメリカ合衆国に該当するもの )⑩一⑳のうちから一つ選べ。 ・人] 人避@ の 末庄寺S >語ゅささマロ 100 200 300 400 500 600代ん 各国からロシアへの輸入額 IIIIEREIVRIKRKIIKIIIIべべべ 。. RCSJ7ojpr Siarisgicg/ ucagiog 2075により作成。 0

至急です😱💦💦 この二つの問題ってなにが違うんですか？ どうして1枚目はただ判別式に当てはめるだけなのに、2枚目のはD＝0 D<0 D>0って全通りやるんですか？ 教えてください！！

*200 次の2次方程式の実数解の個数を求めよ。 Q) 2T2zキ5=0 (2② 2%ー5z+1=0 (3) 3〆%ー273ァ+1=0 AA こらへっっ。 にREがICPSRREERRIIRREIEEPEZSEEE2ZS772ど区

答え合わせをお願いします

(1) Itwas ahot summer day in New York。 The Johns family decided to go to the Bu Zoo. Janet and Kevin Johns had two children: Thomas. 3 years old, and Sally, 6 month Thomas tiked watching all the animals, but he especially loved the gorillas. The Johns went straight to the gorilla exhibit。 There were six adult gorillas and a three month-old baby gorila. In the Brooklyn Zoo, the animals are not mm cages. They arei 1arge areas dug out of the ground. These areas have fences around them so the animal cannot get out. () Watching the gorillas, Sally started to cry. Kevin took her from Janet。 and Janet lookex in her bag for a bottle ofjuice. In those few seconds, Thomas got ost. (WV) Amwoman saw Thomas chimbing up the fence and shouted, “Stop him!' 4 tallman eached up to get him, but it was too late。 Thomas fll down the other side of the 人once. 革e fel 18 fset onto the hard concrete foor._ア_(①with ②bleeding ③he @sel ⑨lay ⑥his head). Janet and Kevin shouted for help.。 語の2 (V) Before the zoo workers arrived, a gorilla went over to Thomas. It was Momo, an eght- Year-old mother gorilla。 She had her baby gorila on her back。 Wth one armrshe picked p the ittle boy。 Then she walked over to a door carrying the bo very careftly Them che put Thomas dowrn so a zo worker could get him. (VO 。 Thomas as badly hurt and bad to go to the hospital but ater a few daya he was beter () 問1 本文に関する以下の文の空楓に入るものとして最も適切なものを選び、 記号で答えなさい。 1 nllas were. 3 1) According to the paragraph (HI),the gori の pon the fenee cindugareas ぶ out ofthe exhibit a_in cages (②) According to the paragraph (皿), Thomas got ]ost @ @ @6 5@ @ 。 as Keyin and Janet started to cry @ ② while Kevin and Janet Wa8 taking care of Sally < when a bottle ofjuice Wa8 spilt by Kevin and Janet @) According to the paragraph (V), a female gorila の held "Phomae apd brought him to a door ゃcarried Thomas to a door with both other arme took Thomas in order to cimb up to door

緑の文字は絶対要りますか？

なぜx≦−2になるんですか？

30の問題では紫の部分は式の途中に書かなければいけませんか？

ノートのD＝を使わない解き方でも大丈夫ですか？それとも教科書みたいに解かなければいけませんか？

ノートの方の書き方で合ってますか？ 教科書みたいに書かなくてもいいんですか？

この答えで合ってるんですか？

式と答えを教えてくださいm(*_ _)m