12x^3+16x^2-5x-3因式分解

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12x^3+16x^2-5x-3因式分解12x^3+16x^2-5x-3因式分解12x^3+16x^2-5x-3因式分解原式=12x^3+4x^2+(12x^2-5x-3)=4x^2(3x+1)+(4

12x^3+16x^2-5x-3因式分解
12x^3+16x^2-5x-3因式分解

12x^3+16x^2-5x-3因式分解
原式=12x^3+4x^2+(12x^2-5x-3)
=4x^2(3x+1)+(4x-3)(3x+1)(十字相乘)
=(3x+1)(4x²+4x-3)
=(3x+1)(2x-1)(2x+3)