(x+y)(x-y)-(4x³y-8xy³)求化简

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(x+y)(x-y)-(4x³y-8xy³)求化简(x+y)(x-y)-(4x³y-8xy³)求化简(x+y)(x-y)-(4x³y-8xy³

(x+y)(x-y)-(4x³y-8xy³)求化简
(x+y)(x-y)-(4x³y-8xy³)求化简

(x+y)(x-y)-(4x³y-8xy³)求化简
-3xy(x∧2-y∧2)

手机打不出来,前面乘开,后面提取2xy,再进一步合并就行试过了,,貌似合并不了