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x³+3x²-4
=x³-x²+4x²-4
=(x³-x²)+(4x²-4)
=x²(x-1)+4(x²-1)
=x²(x-1)+4(x+1)(x-1)
=(x-1)(x²+4x+4)
=(x-1)(x+2)²
=x³-x²+4x²-4
=(x³-x²)+(4x²-4)
=x²(x-1)+4(x²-1)
=x²(x-1)+4(x+1)(x-1)
=(x-1)(x²+4x+4)
=(x-1)(x+2)²
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X³+3X²-4
=(x³-1)+(3x²-3)
=(x-1)(x²+x+1)+3(x+1)(x-1)
=(x-1)(x²+x+1+3x+3)
=(x-1)(x+2)²
=(x³-1)+(3x²-3)
=(x-1)(x²+x+1)+3(x+1)(x-1)
=(x-1)(x²+x+1+3x+3)
=(x-1)(x+2)²
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2018-04-13 · 知道合伙人教育行家
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x^3+3x^2-4
=(x^3-x^2)+(4x^2-4)
=x^2(x-1)+4(x+1)(x-1)
=(x-1)[x^2+4(x+1)]
=(x-1)(x^2+4x+4)
=(x-1)(x+2)^2
=(x^3-x^2)+(4x^2-4)
=x^2(x-1)+4(x+1)(x-1)
=(x-1)[x^2+4(x+1)]
=(x-1)(x^2+4x+4)
=(x-1)(x+2)^2
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2018-04-13 · 知道合伙人教育行家
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x³+3x²-4
=(x³+2x²)+(x²-4)
=x²(x+2)+(x+2)(x-2)
=(x+2)(x²+x-2)
=(x+2)(x+2)(x-1)
=(x+2)²(x-1)
=(x³+2x²)+(x²-4)
=x²(x+2)+(x+2)(x-2)
=(x+2)(x²+x-2)
=(x+2)(x+2)(x-1)
=(x+2)²(x-1)
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