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数学
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a²+(a+1)²+a²(a+1)² 分组分解公因式,
人气:192 ℃ 时间:2020-06-27 05:59:58
解答
原式=a²+a²+2a+1+a²(a+1)²
=a²(a+1)²+2a²+2a+1
=【a(a+1)】²+2(a²+a)+1
=(a²+a+1)²
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