计算(x^2+9x)/(x^2+3x)+(x^2-9)/(x^2+6x+9)
解方程(x-2)X(x的平方-6x-9)=x(x-5)X(x-3)
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
计算(x*x+4x+5)/(x+2)-(x*x+6x+10)/(x+3)+1
计算:(x+2)/(x^2 - x - 6) + 2x/(x^2 - 3x) - x/(x^2 - 6x + 9)
计算 x(x+3)-(x-1)(x-2)
解方程:(x-8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)
不等式|(x+3)/x|>(x+3)/x,不等式(x²-9)/(x-2)>0
计算:(9-x²)分之2x+x-3分之一-x²+6x+9分之-2
【计算(过程)】-x^2*(-x)^3+3x^3*(-x^2)-4(-x)*(-x)^4
计算:根号下{(x^2-3x+2)/(x^2-6x+9)} *{(x-3)/根号下(2-x)}+根号下(-x)
计算:(2/3x根号下9x+6x根号下y/x)+(y根号下x/y-x的平方根号下1/x)=
计算:2x-6/4-4x+x^2除以(x+3)乘以x^2+x-6/x+3