600万马赫:分解因式X^3-7X+6
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分解因式X^3-7X+6
x^3 -7x +6
=x^3-x-6(x-1)
=x(x+1)(x-1)-6(x-1)
=(x-1)(x*x+x-6)
=(x-1)(x+3)(x-2)
=(x-2)(x-1)(x+3)
x^3 -7x +6
=x^3-x-6(x-1)
=x(x+1)(x-1)-6(x-1)
=(x-1)(x*x+x-6)
=(x-1)(x+3)(x-2)
=(x-2)(x-1)(x+3)