因式分解:x^4+2x^3-3
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x^4+2x^3-3
=x^4-x^3+(3x^3-3)
=x^3(x-1)+3(x^3-1)
=x^3(x-1)+3(x-1)(x^2+x+1)
=(x-1)(x^3+3x^2+3x+3)
=x^4-x^3+(3x^3-3)
=x^3(x-1)+3(x^3-1)
=x^3(x-1)+3(x-1)(x^2+x+1)
=(x-1)(x^3+3x^2+3x+3)
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x^4+2x³-3
=x^4-x³+3x³-3
=x³(x-1)+3(x³-1)
=x³(x-1)+3(x-1)(x²+x+1)
=(x-1)(x³+3x²+3x+3)
=x^4-x³+3x³-3
=x³(x-1)+3(x³-1)
=x³(x-1)+3(x-1)(x²+x+1)
=(x-1)(x³+3x²+3x+3)
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