x-(x-x)这种数学运算怎么做就是如x-(5/2-15)怎么算
2x/(x^2+x)-1/x=5/(x+1)怎么做?
(2X+3)(2X-3)-4X(X-1)+(X-2)²怎么运算,
(x^2+5x+5)/( x^2+5x+6)-(x^2+8x+14)/(x^2+8x+15) 数学分式运算
2(x+6)(x-5)怎么算?一般这种题怎么算啊?
有谁知道数学通分X-Y/2X+2Y与XY/(X+Y)怎么做?
分母中带未知数如1/x+1/x+5=1/6怎么运算
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怎么用计算器算这种混合运算:(a+b)x(c+d)x(e+f)=?
(x-3)(x+5)-(x+1)²这道题怎么做?
|x+3|-|2x-1|+|x-2|>1怎么做
lim(sin(x^2*cos(1/x)))/x怎么做?
(5x+2)(x-2) -5(x+1)(x-3)怎么做