若xx+yy+2x-6x+10=0,求x乘以y的值
已知xx+yy+4x-6y+13=0,求(xx-2x)/xx+3yy的值.
已知 xx-2x+yy+6y+10=0 求x+y的值
已知2x=3y,求xy/xx+yy-yy/xx-yy的值
若(xx)+(yy)-4x+6y+13=0,求2x+3y的值?
已知x(x+1)-(xx+y)=3,求(xx+yy)/2-xy的值
x(x+1)-(xx+y)=-3,求(xx+yy)/2-xy的值
已知xx+yy-4x-6y+13=0求3x+4y的值
已知(x+y)(x+y)=25,(x-y)(x-y)=9求xy与xx+yy的值
(x-y)(x+y)(xx-yy)=?
已知x-y=2,(xx)-(yy)=12,求x与y的值
已知XX+YY+4X-6Y+13=0,则X的Y次方是
xx+2x+2y+yy+2=0,则求x的2006次方加y的2007次方的值