已知X,Y满足x+y=4,x^2-y^2=20,求x,y的值
已知x,y满足y^4+2x^4+1=4x^2y,求x,y的值
已知实数x,y满足(x+y)^2=1,(x-y)^2=25,求x,y的值
已知x,y满足x^2+y^2-6x+8y+25=0,求y^x的值
已知x,y的值满足方程组x+2y=3,x-y=-2,求x/(x-y)²+x²-y²/(x+
已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值?
已知:x,y满足|2x-y|+|y-1/2|=0,求7x-3y的值.
已知正整数x,y满足2∧x 49=y,求x,y值
已知非零有理数x,y满足x²-4xy+4y²=0,求x-y/x+y-y-x/x+y的值.
已知实数X、Y满足X²+4y²+2x-4y+2=0 求X的2y次方+2x的值
已知实数x.y满足根号(x+y-8)+根号(8-x-y)=根号(3x-y-4)+根号(x-2y+7),求x,y
已知xy满足x^2+y^2+4/5=2x+y 求代数式yx/x+y的值
已知实数xy满足x^2+y^2-6x+4y+13=0求x^y的值