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数学
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因式分解法,
(x-1)(x+2)=2(x+2)
人气:187 ℃ 时间:2020-05-11 21:18:55
解答
(x-1)(x+2)-2(x+2)=0
(x+2)(x-1-2)=0
(x+2)(x-3)=0
x=-2,x=3(x+2)(x-1-2)=0怎么来的哟提取公因式
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