题目内容
(-5xy2)2-(7xy-8x3y)(-6xy3)
答案:
解析:
解析:
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解:原式=25x2y4-(-42x2y4+48x4y4) =25x2y4+42x2y4-48x4y4 =67x2y4-48x4y4 |
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题目内容
(-5xy2)2-(7xy-8x3y)(-6xy3)
|
解:原式=25x2y4-(-42x2y4+48x4y4) =25x2y4+42x2y4-48x4y4 =67x2y4-48x4y4 |