若x^2+4x+y^2-8y+20=0,则y^x的值是?
已知(x+y)(x+y+2)-8=0,则x+y的值是?
已知x^2+y^2-4x-8y+20=0,则logx(y^x)的值是
实数X.Y满足X*X+Y*Y-2X-2Y+1=0,则(Y-4)/(X-2)的取值范围是?
已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值?
若4x-5y=0,则x+y分之x-y的值是
若实数x,y满足x^2+y^2-6x-4y+12=0,则x^2+y^2的取值范围是
已知实数x,y满足x^2+y^2-6x-8y+24=0,则3x+4y-10的取值范围是
若x^2+y^2-8x-10y+41=0,求x/y+y/x的值
x^+y^-4x+8y+20=0,则x+y的值为多少?
设x,y是有理数,并且x,y满足x^2+2x+y^2-4y+5=0求x+y的值
若实数X,Y满足X^2+3Y^2-12Y+12=0,则Y的值是?
若|x+y-1|+(x-y-2)²=0,求代数式(x+2y)(x-2y)-(2x-y)(-y-2x)的值.