Grade

Type of questions

Mathematics Senior High

写真二枚目の疑問点に答えていただきたいです。一応考えとして三枚目のようにしてみましたが,こういうことなんですかね?

だったんだね。このような問題が自力でスラスラ解けるようになるまで反 の疑問だね。解の公式そのものは, 中学でも習っていると思うけれと, れをキチンと導くには, 絶対値の計算など, やはり高校数学の知識が必要 HRF3G-20-2 ● 解の公式の証明もやっておこう ! これまでの解説で, 2次方程式の解の公式の使い方も十分にマス。 復練習することだ。実力がグングン伸びるはずだよ。 きたと思う。これで, 2次方程式の解法にも自信がついただろうっ となるかを知りたいって? エツ, 当然 2a でも何故解の公式がx=ーb±vb-4ac なんだね。 ここでは,理解を助けるために, 具体的な2次方程式(P109): +6r+4=0 …① の解法と並行させながら, 一般の2次方程式: ar'+bx+c=0 (aキ0) の解の公式を導くことにしよう。具体例と一般論を対比しながら, よ~く 見ていってくれ。 ax'+ bx+c=0 (aキ0) 両辺をaで割って +6x+4=0 *ax : 0 a 三 (これを平方完成にもち込む) (これを平方完成にもち込む (x°+6x+9) +4-9=0 b b 6? =0 4a° C- a 2a a 2で割って2乗) 9をたした分, 2を引く。 2で割って2乗 b 2a をたした分, 4を引く。

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English Senior High

長文がわかりません

The response of local people to volunteer work by high school students 2 The importance of volunteer work by high school students in a community 1 Understanding the community in which high school students live 3 The success of a high school through the efforts of a great principal 2. According to the glaph and table, which of the following is true about the students at 2/4 速読編 【目標時間8分) 8点 1 Which is the best title for the passage? 精読編 【目標時間 12分) 内容理解 St. Martin's? 0 Nearly half of them did five to ten hours of volunteer work a month (6点) 2 Alarge percentage of them did not do any volunteer work. 。Thev were not so interested in helping others as in learning something new. The most popular reason for volunteering was to get work experience. 3. According to the passage, which of the following is true about St. Martin's High School in 2008? (6点) 0 Parents wanted to move the school toa new location in a new city. 2 Mr. Amster thought the students should learn more about the community. 3 The students did more volunteer work with their families than in 2009. 1 Half of the students and their families decided to leave the communitv. (6点) 4. 下線部(1)の this の内容を日本語で説明しなさい。 5. 下線部(2) を和訳しなさい。 (6点) (8点) 6. According to the passage, which of the following is true? U Volunteering has helped many students improve their self-esteem. The 2009 volunteer projects mainly involved cleaning the environment. 9MOS students stop doing volunteer work when thev graduate from school. Parents of the students do not take part in volunteer activities. 5

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