※中学3年生向け「因数分解」について,このサイトには次の教材があります. この頁へGoogleやYAHOO ! などの検索から直接来てしまったので「前提となっている内容が分からない」という場合や「この頁は分かったがもっと応用問題を見たい」という場合は,他の頁を見てください. が現在地です. ![]() ![]() |
《解説》
例えばx2−2x−8を因数分解するには
(1) 最初に「積」が−8となる2数の組合せを考えます. 「積」は定数項(xの付いていない項)から考えることが重要!
「和」はxの係数から考えることが重要!
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《問題》 左の式を因数分解すると,右のどの式になりますか. ○ルール:はじめに左側の式を一つクリックし,続けて「右側の式で対応するもの」をクリックすると消えます.間違えば消えません. ○間違ったときは右側の式を連打するのではなく,左側の問題を選び直すことから始めてください. ○間違ったときに,HELPを見る場合も見ない場合も,左側の問題を選び直せばやり直すことができます. |
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