题目内容
将下述多项式分解后,有相同因式x-1的多项式有
①x2-7x+6; ②3x2+2x-1; ③x2+5x-6; ④4x2-5x-9; ⑤15x2-23x+8; ⑥x4+11x2-12
- A.2个
- B.3个
- C.4个
- D.5个
C
①x2-7x+6=(x-1)(x-6)②3x2+2x-1=(x+1)(3x-1)③x2+5x-6=(x+6)(x-1)④4x2-5x-9=(x+1)(4x-9)⑤15x2-23x+8=(x-1)(15x-8)⑥x4+11x2-12=(x2 -1)(x2 +12)=(x+1)(x-1)(x2 +12)将上述多项式分解后,有相同因式x-1的多项式有4个:①③⑤⑥
①x2-7x+6=(x-1)(x-6)②3x2+2x-1=(x+1)(3x-1)③x2+5x-6=(x+6)(x-1)④4x2-5x-9=(x+1)(4x-9)⑤15x2-23x+8=(x-1)(15x-8)⑥x4+11x2-12=(x2 -1)(x2 +12)=(x+1)(x-1)(x2 +12)将上述多项式分解后,有相同因式x-1的多项式有4个:①③⑤⑥
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