1.5x+(x+5)÷3>0
(x-2)(x-3)/(x+5)(x-7)>0
1.5x+(x+5)÷3>0
若x满足1-7x<3-5x,-3x>0 化简代数式|x|-|x+1|
5(x²-x)-3(x²+x)=0
已知1+x+x^2+x^3=0,求x+x^2+x^3+x^4+x^5+x^6+x^7+x^8的值
x+3/x+1-x+5/x+3-x+7/x+5+x+9/x+7=0
不等式|(x+3)/x|>(x+3)/x,不等式(x²-9)/(x-2)>0
1,设x>0,求(2x²+5x+3)/x的最小值
已知x²+3x-1=0 求(x-3)÷(3x²-6x)÷(x+2-[5÷(x-2)])的值
若x²+3x-1/3=0 则代数式x-3/3x²-6x÷(x+2-5/x-2)的值
1.若x^2+3x-1=0,则x-3/3x^2-6x÷(x+2 - 5/x-2)=________.
已知x²+3x-1=0,求(x-3)/(3x²-6x)÷(x+2-5/(x+2))的值