若(x-3)²+|x+y-5|=0,求x²+y²
若(x-3)²+|x+y-5|=0,求x²+y²
(1)已知x+y=6,x²-y²=5,求x-y的值(2)若x+y=3,x²+y²
若|x+y-1|+(x-y-2)²=0,求代数式(x+2y)(x-2y)-(2x-y)(-y-2x)的值.
若|x+2y-1|+y²+4y+4=0,求(2x-y)²-2(2x-y)(x+2y)+(x+2y)&
若(3x-y+5)²+√2x-y+3=0,求x-y的值
若(x+y-5)²+根号下x-y+1=0,求-4x+3y的算术平方根
若4x²-4x+9y²-12y+5=0,求(x-3y)²-(x+3y)²
若x+y=1,x²+y²=3,求x^3+y^3
已知x²+y²-2x+4y+5=0,求x+y
x+y=3,x²+y²=5,求(x-y)^2014
2x²-3xy=y²=0(x,y不得o)求x/y+y/x
已知y-2x=0,求3x²-2y²/(x+y)(x-y)的值