因式分解2x三次-6x+4

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因式分解2x三次-6x+4因式分解2x三次-6x+4因式分解2x三次-6x+42x³-6x+4=2x³-2-6x+6=2(x-1)(x²+x+1)-6(x-1)=2(x-

因式分解2x三次-6x+4
因式分解2x三次-6x+4

因式分解2x三次-6x+4
2x³-6x+4
=2x³-2-6x+6
=2(x-1)(x²+x+1)-6(x-1)
=2(x-1)(x²+x+1-3)
=2(x-1)(x²+x-2)
=2(x-1)(x+2)(x-1)
=2(x-1)²(x+2)

原式=2x三次-2x-4x+4
=2x(x平方-1)-4(x-1)
=2x(x-1)(x+1)-4(x-1)
=2(x+2)(x-1)平方

2x³-6x+4
=2(x-1)(x²+x-2)
=2(x-1)(x-1)(x+2)
=2(x-1)²(x+2)