x^3+3x^2-4x-12 因式分解

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x^3+3x^2-4x-12因式分解x^3+3x^2-4x-12因式分解x^3+3x^2-4x-12因式分解x^3+3x^2-4x-12=x^2(x+3)-4(x+3)=(x+3)(x^2-4)=(x

x^3+3x^2-4x-12 因式分解
x^3+3x^2-4x-12 因式分解

x^3+3x^2-4x-12 因式分解
x^3+3x^2-4x-12
=x^2(x+3)-4(x+3)
=(x+3)(x^2-4)
=(x+3)(x+2)(x-2)

x^3+3x^2-4x-12
=(x^3+3x^2)-(4x+12)
=x^2(x+3)-4(x+3)
=(x+3)(x^2-4)
=(x+3)(x+2)(x-2)