若丨x-2丨+丨y+3丨=0:(1)x,y的值 (2)求丨x+y丨的值
已知丨x+2y+3丨+(2x+y)=0,求x-y的值
丨x+2y+3丨+(2x+y)²=0,求x-y的值
(1)已知x/y=1/2,求代数式2x+y/2x+3y的值.(2)若丨x+1/2丨+(2y-1)²=0,求x&
已知丨3x+y-5丨+丨x-2y-4丨=0 求x,y的值
丨3x+2y+3丨+(2x-4y-14)²=0,求x y的值.
若有理数x,y满足2012(x+1)的平方+丨2x-y丨=0,求x的丨y丨次幂+y的x+3次幂的值
已知,丨x+2丨+(y+1)的二次方=0,求-3(x-2y)-2(2x-y)的值
已知(5x-2y-3)²+丨2x-3y+1丨=0,求x+y的值,给我个解这道题的思路
若丨x-y+3丨与丨x-y-1999丨互为相反数,求x+y/x-y的值
若|x+y-1|+(x-y-2)²=0,求代数式(x+2y)(x-2y)-(2x-y)(-y-2x)的值.
已知丨x+3丨+丨y-x+4丨=0,求(x-y)(x+y)的值 越快分越多.
已知丨x+3|+|2x-y|=o求2(3x-2y)-4[3(x-y)-2(x-2y)]的值