x^3-10x+9因式分解

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x^3-10x+9因式分解
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x^3-10x+9因式分解
x^3-10x+9因式分解

x^3-10x+9因式分解
原式=(x³-x)-9x+9
=x(x+1)(x-1)-9(x-1)
=(x-1)(x²+x-9)

x^3-10x+9
=x^3-1-(10x-10)
=(x^3-1)-10(x-1)
=(x-1)(x^2+x+1)-10(x-1)
=(x-1)(x^2+x-9)