2x²-4x+2 分解因式.
问题描述:
2x²-4x+2 分解因式.
答
2x²-4x+2
=2x^2-2x-2x+2
=2x(x-1)-2(x-1)
=(2x-2)(x-1)
=2(x-1)(x-1)
=2(x-1)^2