若|x-2y+6|+(x+y+12)的2次方,求4x+5y

若|x-2y+6|+(x+y+12)的2次方,求4x+5y 【2(x-y)(x-y)(x-y)-8(x-y)(x-y)(x+y)+6y(x-y)(x-y)]/2(x-y)(x-y) 若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值 2(y-x)的平方-7(x-y)+6(x-y)-3(y-x)的平方 若x*x+y*y=x+y-1/2,求x,y的值如题 x,y 满足x(x-2)-y(y-6)=-10,求x,y的值 若x、y满足2x+y=6,x-3y=1,求7y(x-3y)²-2(3y-x)³的值 已知x^2-y^2=12,x+y=6,求x^y-y^x的值. 若x^2+y^2-6x+8y+25=0 则y/x-x/y的值是 若x^2+y^2-10x-6y+34=0,求（x-y)/(x+y)的值 [12(x+y)^3+3(x+y)(x-y)^2]÷6(x+y) 若(x-y)/(x+y)=3 则(x+2y)/(6x-7y)等于 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 x^2+y^2+4x-6y+12=0.求x^y的值 已知x^2+y^2=12,x+y=6,求x、y的值. x*x+2x-y*y+6y-8=0,x+y不等于2,求x-y的值 (y-x)²(x-y)+(x-y)的三次方+2(x-y)²(y-x) 若X-2Y+6+（X+Y+12）²=0,求4X+ 5Y的值若X-2Y+6的绝对值+（X+Y+12）²=0，求4X+ 5Y