Mathematics
Senior High
(５)です。
9 次の式を展開せよ。
*) 12全学が)
介 (2ー2Z十1)(2十1)
*⑮) (2テーッャ十3z)(x二2yー。)
(7 (*"ー3x*ー2*十1)(x*ー3)
MI9 (3+のー2Z)(3g十22の9
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