2x^2-5x+1 因式分解 2X是二次项

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2x^2-5x+1因式分解2X是二次项2x^2-5x+1因式分解2X是二次项2x^2-5x+1因式分解2X是二次项2x^2-5x+1=2(x^2-5x/2+1/2)=2[(x^2-5x/2+25/16

2x^2-5x+1 因式分解 2X是二次项
2x^2-5x+1 因式分解
2X是二次项

2x^2-5x+1 因式分解 2X是二次项
2x^2-5x+1
=2(x^2-5x/2+1/2)
=2[(x^2-5x/2+25/16)-25/16+1/2]
=2[(x-5/4)^2-17/16]
=2(x-5/4-√17/4)(x-5/4+√17/4)

(2x)^2-5x+1
=4x^2-5x+1
=4x(x-1)-(x-1)
=(x-1)(4x-1)