因式分解:(1)n²(m-2)-n(2-m) (2)x³-6x²+9x
问题描述:
因式分解:(1)n²(m-2)-n(2-m) (2)x³-6x²+9x
答
(1)n²(m-2)-n(2-m)
=n²(m-2)+n(m-2)
=n(m-2)(n+1)
(2)x³-6x²+9x
=x(x²-6x+9)
=x(x-3)²