因式分解3x^2-2x-1

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因式分解3x^2-2x-1因式分解3x^2-2x-1因式分解3x^2-2x-13x^2-2x-1=(3x+1)(x-1)解3x²-2x-1=3x²-3x+x-1=3x(x-1)+(

因式分解3x^2-2x-1
因式分解3x^2-2x-1

因式分解3x^2-2x-1
3x^2-2x-1
=(3x+1)(x-1)


3x²-2x-1
=3x²-3x+x-1
=3x(x-1)+(x-1)
=(3x+1)(x-1)