Mathematics
Junior High
③と④の問題の解き方がわからないので
解き方教えて下さい。
(2) 次の式を計算しなさい。
①
1 x−y+x+3y
2
3 (x+2)²-(x-1)(x-3)
〔香川〕
[高知]
2 (-3a)²x26÷(-2a²)
④ (x-4)²-2(x+3)(x-3)
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