x^4-1-4x^2-4x怎么做?
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x^4-1-4x^2-4x怎么做?x^4-1-4x^2-4x怎么做?x^4-1-4x^2-4x怎么做?x^4-(4x²+4x+1)=(x²)²-(2x+1)²=
x^4-1-4x^2-4x怎么做?
x^4-1-4x^2-4x怎么做?
x^4-1-4x^2-4x怎么做?
x^4-(4x²+4x+1)
=(x²)²-(2x+1)²
=(x²+2x+1)(x²-2x-1)
=(x+1)²(x²-2x-1)
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x^4-1-4x^2-4x怎么做
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