x^3-4x+3x^2-12
问题描述:
x^3-4x+3x^2-12
答
x^3-4x+3x^2-12=x^2(x+3)-4(x+3)=(x^2-4)(x+3)=(x+2)(x-2)(x+3)
x^3-4x+3x^2-12
x^3-4x+3x^2-12=x^2(x+3)-4(x+3)=(x^2-4)(x+3)=(x+2)(x-2)(x+3)