(x+1)x(x+1)-(1-x)x(1-x) x等于几?
(x+1)x(x+1)-(1-x)x(1-x) x等于几?
[x(x+1)+x平方(x-1)]+(-3x)
x/(x-3)-2/(x+3)=1【x等于几
x²+x为什么等于x(x+1),x²-1为什么等于(x+1)(x-1)?
若1+x+x*x+x*x*x=0,求x+x*x+x*x*x+.+x(2000次幂)
(x-1)/x -(1-x)/(x+1)=(5x-5)/(2x+2) x等于多少
-5x+1>3(x-1)等于几
(x/x-1)+(5x-2)/x*x-x=1 求x(有图)
-x(x+1)(x-1)+x(x的平方-2)(大于等于0)
若(2-x):x=x:(1-x ),则x等于?
(X+1)/X 等于多少?
(-3x²)(-x²+2x-1) 等于?