因式分解想x(6x-1)-1

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因式分解想x(6x-1)-1因式分解想x(6x-1)-1因式分解想x(6x-1)-1x(6x-1)-1=6x^2-x-1=(2x-1)(3x+1)(十字相乘)6x^2-x-1=(2x-1)(3x+1)

因式分解想x(6x-1)-1
因式分解想x(6x-1)-1

因式分解想x(6x-1)-1
x(6x-1)-1
=6x^2-x-1
=(2x-1)(3x+1) (十字相乘)

6x^2-x-1=(2x-1)(3x+1)

x(6x-1)-1
=6x^2-x-1
=(3x+1)(2x-1)

=6x²-x-1
=(2x-1)(3x+1)
十字相乘法