x4-x3-7x2+13x-6因式分解如题

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x4-x3-7x2+13x-6因式分解如题
x4-x3-7x2+13x-6因式分解
如题

x4-x3-7x2+13x-6因式分解如题
x4-x3-7x2+13x-6
=x^3(x-1)-(7x^2-13x+6)
=x^3(x-1)-(7x-6)(x-1)
=(x^3-7x-6)(x-1)
={x^2(x-1)-6(x-1)}(x-1)
=(x^2-6)(x-1)^2

这是什么题目啊？

=(x4-x3)-(7x2-13x+6)
=x³(x-1)-(7x-6)(x-1)
=(x-1)(x³-7x+6)
=(x-1)(x³-1-7x+7)
=(x-1)²(x²+x-6)
=(x-1)²(x+3)(x-2)

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