计算(x/4)^2 + ((20-x)/x)^2 =12
计算2x X 4x--3x=
计算(x/4)^2 + ((20-x)/x)^2 =12
计算:x^2-x=?
【计算(过程)】-x^2*(-x)^3+3x^3*(-x^2)-4(-x)*(-x)^4
计算(x²+4x-12/x²+x+1)(x²-1/x²-4x+4)(2-x/x&
分式计算:x^5-4x^3+x+2/x^3+6x^2+12x+8(约分)
计算(x*x+4x+5)/(x+2)-(x*x+6x+10)/(x+3)+1
计算2x*(-x)4次方=?
计算(-x)^12÷(-x^4+x)^2=
计算:(1/X^2+3X+2)+(1/X^2+5X+6)+(1/X^2+7X+12)=(1/X^2+9X+20)
计算:1/(x^2-7x+10)+1/(x^2-x-2)+1/(x^2+5x+4)+1/(x^2+11x+28)=( )
F(X)=2X^3+6X^2-8X计算:(1)F(X)•(-2X);(2)2F(X)-4X