①10x²-x-3=0②(3-Y)²=(2y-1)²
2x²-3xy=y²=0(x,y不得o)求x/y+y/x
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4x²+y²-4x-6y+10=0求(2/3x(√9x)+(y²√x/y³)
已知|x+y+2|+(2x-3y-1)²=0 求 ⑴x、y的值 ⑵2x³-x²-3y
(1)已知x+y=6,x²-y²=5,求x-y的值(2)若x+y=3,x²+y²
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+|y+x|=x-1/4,求(3x+y)²(2x-y)²-(4x²+y&
[(2x+3y)²-(y+2x)(2x-y)-10y(x+y+1)÷2y其中x=2019,y=20
已知实数x,y满足根号(x+3y-1)+y²+2y+1=0,求2x-y的平方根
已知x-3y=0,y≠0,求x²-2xy+y²分之2x+y×(x-y)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