若x+y=6,x^2-y^2=24,则y-x的值为
若实数x,y满足2x*X+3y*y=1,S=3x*x-2y*y,则S的取值范围为
若x^2+y^2-4x+6y+13=0,则2x+3y的值为
若4x^2+y^2-4x+6y+10=0,则x^y的值为?
int x=2,y=3;则++x>y--?x:y的值为2,
若(x-y)/(x+y)=3 则(x+2y)/(6x-7y)等于
已知2/x+2/y=根号24,求 x/y(x-y) - y/x(x-y)的值
已知2/x 2/y=根号24,求 x/y(x-y) - y/x(x-y)的值
若m/x²-y²=2xy-y²/x²-y²+x-y/x+y,则m的值为
若3(X-Y)=2(X+Y),且X不等于0,则X/Y+Y/X的值为多少大神们帮帮忙
若x、y满足2x+y=6,x-3y=1,求7y(x-3y)²-2(3y-x)³的值
已知1/x-1/y=3,则代数式x(2-7y)-y(7x+2)/x(1-y)-y(x+1)的值为多少.
已知x/1-y/1=3,则5x+xy-5y/x+2y-y的值为