若(x-3)²=169,(y-1)³=-0.125,
(1)已知x+y=6,x²-y²=5,求x-y的值(2)若x+y=3,x²+y²
若|x+2y-1|+y²+4y+4=0,求(2x-y)²-2(2x-y)(x+2y)+(x+2y)&
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=6 x-3y=1,求7y(x-3y)²-2(3y-x)³的值
若[x+y-1]+(y+3)²=0,则x-y的值为().
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+y+2|+(2x-3y-1)²=0 求 ⑴x、y的值 ⑵2x³-x²-3y
1/2 x²y·( )=2x³y-x²y²
已知方程组2x-y=10,x+2y=11,求(2x-y)³-(2x-y)²(x-3y)的值
若实数x,y满足x的平方+2√3x+根号(x+y+1)+3=0,求代数式(1/x-y+1/x+y)÷y/(x²
已知:3x=8y.求(1)x+y/y (2)2x+3y/x-2y
已知x²+|y+x|=x-1/4,求(3x+y)²(2x-y)²-(4x²+y&