x+y=3,x²+y²=5,求(x-y）^2014

x+y=3,x²+y²=5,求(x-y）^2014 (1)已知x+y=6,x²-y²=5,求x-y的值（2）若x+y=3,x²+y² 已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) 2x²-3xy=y²=0（x,y不得o）求x/y+y/x 已知x²+y²+5=2x+4y,求【2x²-(x-y)(x-y)】【(x+y-1)(x-y 若|x+2y-1|+y²+4y+4=0,求（2x-y）²-2（2x-y)(x+2y)+(x+2y)& 已知x²+y²-8x+6y+25=0,求（x-y+4xy/x-y）（x+y-4xy/x+y） 若|x+y-1|+（x-y-2)²=0,求代数式（x+2y)(x-2y）-（2x-y)(-y-2x)的值. 已知方程组2x-y=10,x+2y=11,求（2x-y)³-（2x-y）²（x-3y）的值 已知X²+3XY-4Y²=0（Y≠0）求X-Y/X+Y 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x²+y²+5=2x+4y,求代数式（2x²-（x+y)(x-y))x((x+y-1)