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