计算 (x^2-2x+3)(x-1)(x+1)要过程

问题描述:

计算 (x^2-2x+3)(x-1)(x+1)要过程

=(x^2-2x+3)(x^2-1)
=x^2(x^2-2x+3)-(x^2-2x+3)
=x^4-2x^3+3x^2-x^2+2x-3
=x^4-2x^3+2x^2+2x-3