Mathematics
Senior High
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どちらもわかりません教えてください
1. 次の式を計算せよ。
(1)(3z2- 2.x-4) +2(2ーエ+2) - 3(x-エ+4)
(2)(エ+y)+(-y)
(3)(エ
(と
2. 次の式を展開せよ。
(1)(5a+8h)(2a-7b)
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