-a平方b(a立方b平方-3a平方b+b立方)-2ab平方(a4次方b-3a立方-2ab平方)
人气:314 ℃ 时间:2019-10-23 01:21:01
解答
-a平方b(a立方b平方-3a平方b+b立方)-2ab平方(a4次方b-3a立方-2ab平方)
=-a^5b^3+3a^4b^2-a^2b^4-2a^5b^3+6a^4b^2+4a^2b^4
=a^5b^3+9a^4b^2+3a^2b^4
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