1、x³+x²y-x²z-xyz2、9(x²-y²)-(y-x)²3、x^m-1 -x^m+2 +x^m -x^m+1要准确率的哟~

问题描述:

1、x³+x²y-x²z-xyz
2、9(x²-y²)-(y-x)²
3、x^m-1 -x^m+2 +x^m -x^m+1
要准确率的哟~

3.因式分X的平方-BX-A的平方+AB 请都写出计算过程,或如何推导公式!小懒虫:M^3代表M的三次方,以此类推。第一题:M^3+2M^2+3=M^3+M^

x³+x²y-x²z-xyz
=x²(x+y)-xz(x+y)
=(x²-xz)(x+y)
=x(x-z)(x+y)
9(x²-y²)-(y-x)²
=9(x+y)(x-y)-(y-x)²
=(x-y)(9x+9y-x+y)
=2(x-y)(4x-5y)
x^m-1 -x^m+2 +x^m -x^m+1
=x^m-1(1-x³+x-x²)
=x^m-1[(1+x)-x²(1+x)]
=x^m-1(1-x²)(1+x)
=x^m-1(1-x)(1+x)²