チ0ナ0欣赏是一种善良读后感チ0ニ3阅读答案

(xƝ5+7x+6)(xƝ5+7x+12)-280因式分解, (xƝ5+7x+6)(x&
(xƝ5+7x+6)(xƝ5+7x+12)-280因式分解
匿名 (xƝ5+7x+6)(xƝ5+7x+12)-280因式分解
分解因式(x^2+7x+6)(x^2+7x+12)-280设t=x^2+7x+6原式=t(t+6)-280=t^2+6t-280=(t+20)(t-14)=(x^2+7x+26)(x^2+7x-8)=(x^2+7x+26)(x+8)(x+1)全国客服热线:400-666-7788
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