分解因式:1.x的5次方-x的3次方 2. x的平方(y-8)+8的2次方(8-y)

2025-05-05 17:30:33
推荐回答(1个)
回答1:

:1.x的5次方-x的3次方
=x³(x²-1)
=x³(x+1)(x-1)

x的平方(y-8)+8的2次方(8-y)
=x²(y-8)﹣8²(y-8)
=(x²-8²)(y-8)
=(x+8)(x-8)(y-8)

(x-1)(x+2)的3次方-4(x-1)的3次方(x+2)
=(x-1)(x+2){(x+2)²-[2(x-1)]²}
=(x-1)(x+2)(x+2+2x-2)(x+2-2x+2)
=3x(x-1)(x+2)(4-x)