
因式分解~~!急!!
(1)(x+y)²(x-y)+(x+y)(x-y)²(2)(a-b)²(a+b)³-(b-a)²(b+a)²...
(1)(x+y)²(x-y)+(x+y)(x-y)²
(2)(a-b)²(a+b)³-(b-a)²(b+a)² 展开
(2)(a-b)²(a+b)³-(b-a)²(b+a)² 展开
1个回答
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(1)(x+y)²(x-y)+(x+y)(x-y)²
=(x+y)(x-y)[((x+y)+(x-y)]
=2x(x+y)(x-y)
(2)(a-b)²(a+b)³-(b-a)²(b+a)²
=(a-b)²(a+b)³-(a-b)²(a+b)²
=(a-b)²(a+b)²(a+b-1)
=(x+y)(x-y)[((x+y)+(x-y)]
=2x(x+y)(x-y)
(2)(a-b)²(a+b)³-(b-a)²(b+a)²
=(a-b)²(a+b)³-(a-b)²(a+b)²
=(a-b)²(a+b)²(a+b-1)
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