(x+y)的5次方除以(-x-y)的3次方乘以(x-y)的2次方(要步骤)

2025-01-19 16:31:13
推荐回答(3个)
回答1:

(x+y)^5=(x+y)^5 (^5表示5次方,期于类推)
(-x-y)^3=(-1)^3*(x+y)^3=-(x+y)^3
所以:
[(x+y)^5]/[(-1)(x+y)^3]=-(x+y)^2
所以
原式=-(x+y)^2*(x-y)^2
=-(x^2-y^2)^2
=-x^4+2*x^2*y^2-y^4.

回答2:

(-x-y)的三方次 = -(x+y)的三次方

所以原式为:
(x+y)^2
- -------
(x-y)^2

回答3:

[(x+y)^(-2)*(x-y)^2]^(-3)
=(x+y)^6*(x-y)^(-6)
=(x+y)^6/(x-y)^6