(a^2-b^2)+(a^2+2b^2)^2
急..........！急.........！来帮帮忙还有这道;;(x+y)^2(x-y)-(x+y)(x-y)^2好的再加分...
急..........！急.........！来帮帮忙
还有这道;; (x+y)^2(x-y)-(x+y)(x-y)^2
好的再加分 展开
还有这道;; (x+y)^2(x-y)-(x+y)(x-y)^2
好的再加分 展开
2个回答
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因式分解?
(a²-b²)+(a²-b²)²
=(a²-b²)(1+a²-b²)
(x+y)²(x-y)-(x+y)(x-y)²
=(x+y)(x-y)((x+y)-(x-y))
=(x+y)(x-y)*2y
=2y(x+y)(x-y)
(a²-b²)+(a²-b²)²
=(a²-b²)(1+a²-b²)
(x+y)²(x-y)-(x+y)(x-y)²
=(x+y)(x-y)((x+y)-(x-y))
=(x+y)(x-y)*2y
=2y(x+y)(x-y)
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(x+y)(x-y)[(x+y)-(x-y)]=2y(x+y)(x-y)=2y(x^2-y^2)
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