1、x³+3x²-4
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1、x³+3x²-4
2、x³+9x²+26x+24
3、(2x²-3x+1)²-22x+33x-1
4、(x+y)³+2xy(1-x-y)-1
5、(x+3)(x²-1)(x+5)-20
2、x³+9x²+26x+24
3、(2x²-3x+1)²-22x+33x-1
4、(x+y)³+2xy(1-x-y)-1
5、(x+3)(x²-1)(x+5)-20
1、﹙拆项法﹚:x³-x²+4x²-4=x²﹙x-1﹚+4﹙x+1﹚﹙x-1﹚=﹙x-1﹚﹙x²+4x+4﹚=﹙x-1﹚﹙x+2﹚².2、﹙分组、拆项法﹚:x³+2x²+7x²+14x+12x+24=x²﹙x+2﹚+7x﹙x+2﹚+12﹙x+2﹚=﹙x+2﹚﹙x²+7x+12﹚=﹙x+2﹚﹙x+3﹚﹙x+4﹚.3、﹙设元法﹚:设2x²-3x+1=y,则原式=y²-11y+10=﹙y-10﹚﹙y-1﹚,∴原式=﹙2x²-3x+1-10﹚﹙2x²-3x+1-1﹚=x﹙2x+3﹚﹙x-3﹚﹙2x-3﹚.4、﹙立方公式﹚:原式=﹙x+y﹚³-1-2xy﹙x+y-1﹚=﹙x+y-1﹚[﹙x+y﹚²+﹙x+y﹚+1]-2xy﹙x+y-1﹚=﹙x+y-1﹚﹙x²+y²+x+y+1﹚.5、﹙设元法﹚:原式=﹙x-1﹚﹙x+5﹚﹙x+1﹚﹙x+3﹚-20=﹙x²+4x-5﹚﹙x²+4x+3﹚-20,设y=x²+4x-1,∴原式=﹙y-4﹚﹙y+4﹚-20=y²-36=﹙y+6﹚﹙y-6﹚=﹙x²+4x+5﹚﹙x²+4x-7﹚
4x²-1/3x²-x·9x³-x/2x^4-x³计算 急
(3x²)³-7x³[x³-x(4x²+1)]
2f(x)+x^2f(1/x)=(3x³-x²+4x+3)/(x+1) 2x²f(1/x)
化简:-3x(x²+1)-[x³-x(4x²+1)].
X²-X-1=0则X³+X²-3X+4=
先化解,在求值;(3x/x-1-x/x+1)÷x四次方-4x²/x³-x,其中x=根号2+2
(x+1-1/1-x)÷(x-x²/x-1) (x-4/x-x-6+ x+2/x-3)÷x+1/x-3
(4x³)²×[x³-x(2x-1)]
设x²-x=-1,则3x^4-5x³+8x²-5x+1等于?
(2x²-2x+3)(-x³+x-1)
f(x)=1+x-x²/2+x³/3-x^4/4+…+x^2013/2013
计算:(3/x)+(x/x²-1)-(4/1-x)