Question

因式分解,过程,1、x三次方-6x平方+9x 2、-x四次方+8x平方-16

Answer 1

雨后泪樱花,

1、x^3-6x^2+9x

=x(x^2-6x+9)

=x(x-3)^2

2、-x^4+8x^2-16

=-(x^4-8x+16)

=-(x^2-4)^2

=-(x+2)^2(x-2)^2