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解答题化简:4(a-b)2-(2a+b)(-b+2a)
解答题化简:4(a-b)2-(2a+b)(-b+2a)
发布时间:2020-07-28 18:03:32
解答题化简:4(a-b)2-(2a+b)(-b+2a)
网友回答
解:原式=4(a2-2ab+b2)-(4a2-b2)
=4a2-8ab+4b2-4a2+b2
=5b2-8ab.解析分析:根据完全平方差公式和平方差公式将原式展开,然后合并同类项即可.点评:本题主要考查完全平方公式、平方差公式,熟记公式的几个变形公式对解题大有帮助.
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