计算(x+1)(x-1)=2√2x
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计算(x*x+4x+5)/(x+2)-(x*x+6x+10)/(x+3)+1
计算5x(2x² -3x+1)
计算2x/(x³-1)÷1/(x²+x+1)=
lim(x趋于∞)[(x+1)/(x+2)]^3x=( )求计算过程
计算:(1)(2x/x+2)的平方×x+2/x(x-2)-(1/x-2-1/x+2)
x^2-1/x^2+4x+4÷(x+1)×x^2+3x+2/x-1计算
计算:[(x²-2x+1)/(x²-1)]÷[(x-1)(x²+x)]-x
计算:1/(x^2-7x+10)+1/(x^2-x-2)+1/(x^2+5x+4)+1/(x^2+11x+28)=( )
计算3x(x^2-x-1)-2x^2(1-x)
F(X)=2X^3+6X^2-8X计算:(1)F(X)•(-2X);(2)2F(X)-4X
计算 2(x²-x+1)-(-2x+3x²)+(1-x)