x^3+5x^2-6x=0x(x^2+5x-6)=0x(x-1)(x+6)=0x1=0, x2=1, x3=-6
x^3+5x^2-6x=0x（x^2+5x-6）=0x(x+6)(x-1)=0得：x=0或x=-6或x=1
先讨厌x为零满足！为一解再同除以x划为一元二次方程就简单了
