5(x-y)的平方-8(x-y)的三次方+(x-y)的平方与5(x-y)的平方+6(x-y)三次方的差

sk198181 1年前 已收到2个回答 举报

gtpk09avi5_00d 幼苗

共回答了11个问题采纳率:100% 举报

5(x-y)的平方-8(x-y)的三次方+(x-y)的平方与5(x-y)的平方+6(x-y)三次方的差
=5(x-y)²-8(x-y)³+(x-y)² - [5(x-y)²+6(x-y)³]
=5(x-y)²-8(x-y)³+(x-y)² - [5(x-y)²+6(x-y)³]
=6(x-y)²-8(x-y)³ -5(x-y)²-6(x-y)³
=(x-y)²-14(x-y)³

1年前

1

小猪纳闷 幼苗

共回答了78个问题 举报

5(x-y)²-8(x-y)³+(x-y)² -[5(x-y)²+6(x-y)³]
=5(x-y)²-8(x-y)³+(x-y)²- [5(x-y)²+6(x-y)³]
=6(x-y)²-8(x-y)³-5(x-y)²-6(x-y)³
=(x-y)²-14(x-y)³

1年前

1
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