3次方程因式分解x^3-3x+2

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3次方程因式分解x^3-3x+2
3次方程因式分解
x^3-3x+2

3次方程因式分解x^3-3x+2
x³-1-3x+3
=(x-1)(x²+x+1)-3(x-1)
=(x-1)(x²+x-2)
=(x-1)(x+2)(x-1)
=(x-1)²(x+2)

x³-x-2x+2
=x(x²-1)-2x+2
=x(x+1)(x-1)-2(x-1)
=(x²+x)(x-1)-2(x-1)
=(x-1)(x²+x-2)
=(x-1)(x+2)(x-1)
=(x-1)²(x+2)

x³-x-2x+2
=x(x²-1)-2x+2
=x(x+1)(x-1)-2(x-1)
=(x²+x)(x-1)-2(x-1)
=(x-1)(x²+x-2)
=(x-1)(x+2)(x-1)
=(x-1)²(x+2)
或者:
x³-1-3x+3
=(x-1)(x&#...

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x³-x-2x+2
=x(x²-1)-2x+2
=x(x+1)(x-1)-2(x-1)
=(x²+x)(x-1)-2(x-1)
=(x-1)(x²+x-2)
=(x-1)(x+2)(x-1)
=(x-1)²(x+2)
或者:
x³-1-3x+3
=(x-1)(x²+x+1)-3(x-1)
=(x-1)(x²+x-2)
=(x-1)(x+2)(x-1)
=(x-1)²(x+2)
这两个思想都一样,通过变化配项。

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