(x-2)(x+1)+2怎么解啊

(3)/(x)+(5)/(2x-1)=(x+27)/2x^2-x怎么解啊! x*x+2*x+1=36,x怎么解, 1/(1-x)+1/(1+x)+2/(1+x*x)+4/(1+x*x*x*x)+8/(1-x*x*x*x*x*x*x*x)怎么做 (180x-36*x)/(x+2x)*2x=(180x-36*x)/(x+2x)*x+36x 这个怎么解啊···· (x+3)(x+2)(x+1)x=3024详细的怎么解啊? -x-1>-x+2 怎么解, (x+2)(1-x)>0怎么解? x2>2x/(x+1)怎么解 84=X+(x+2)+(x-2)怎么解啊 请问x-2x=2x+1怎么解 x(x-1)(x-2)=120怎么解? x*(x+1)*(x+2)=1320怎么解 x²+2x+1=4.X怎么解 2x-(x+3-3(x+1)怎么解 x+(x-1)+(x-2)=48 怎么解 |X+1|小于等于|2-X|.怎么解X 1/(x+1)(x+2)+1/(x+3)(x+4)+1/(x+5)(x+6)+1/(x+7)(x+8)+1/(x+9)(x+10)怎么解 x-1+x-2+x-3+x-4+x-5+x-6+x-7=77怎么解速度!