若x^2+y^2+5/4=2x+y,求x^Y+y^x的值?

若(x*x+y*y)(x*x+y*y)-4x*x*y*y=0,求代数式(x*x+5xy+y*y)/(x*x+2xy+y*y)的值 已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) 若2x-3y=0,求5x+4y/3x-2y 若x^2+y^2+5/4=2x+y,求x^Y+y^x的值? 若(x-y)乘(x+y)=5,(x+y)^2=4,试求x-y的值 x*x+y*y-2x+4y+5=0求x, 若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值 如果|X|=4 |Y|=2 且|X+Y|=X+Y 求X+Y 若x*x+y*y=x+y-1/2,求x,y的值如题 求(X+Y)(X-Y)(X²+Y²),X=5 Y=2, (x-y)/(x+y)=3求( 3x-2y-1)/(x+y-5) 若x-y/x+y=5,求x-y/2x+2y+5x+5y/3x-3y的值 若x+y分之x-y=3,求式子x+y分之5(x-y)—2(x-y)分之x+y的值 若x-y分之x+y=3,求式子x+y分之5(x-y)—2（x-y）分之x+y的值 已知X.x+y.y-4x+2y+5=0,求4X.X-12X Y+9Y.y的值 若x*x+4*y*y+2*x-4*y+2=0,求5*x*x+16*y*y的算术平方跟 若实数x、y满足x平方+y平方-4x-2y+5=0,求根号8y-2x分之（根号x）+y 若实数X,Y满足x²+y²-4x-2y+5=0求√x+y/√8y-2x