y=(x^2+x)/(x+1)
y=(x^2+x)/(x+1)
1、x(x-y)(x+y)-x(x+y)^2
函数,y=3x/(x^2+x+1) ,x
函数y=3x/(x^2+x+1) (x
(1)(x^2/x)-y-x-y
先化简再求值(x-y)(x+y)-(x-2y) 的完全平方+x(3x-5y)-(x-y)(x-2y),其中x=1/2 y
x+y=1,xy=-1/2,求x(x+y)(x-y)-x(x+y)2
(3x-y)^2+(3x+y)(3x-y),x=1,y=-2
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
已知4x=9y求(1)x+y/y (2)y-x/2x
y=(2x*x-2x+3)/(x*x-x+1),求值域?
y=1-x^2 x>=0 ,y=sin|x|/x x