已知2x-y=10 【(x²+y²)-(x-y)²+2y(x-y)】÷4y 过程
已知2x-y=10 【(x²+y²)-(x-y)²+2y(x-y)】÷4y 过程
已知2x-y=10,求[(x²+y²)-(x-y)²+2y(x-y)]/4y
2x-y=10 【(x²+y²)-(x-y)²+2y(x-y)】÷4y
2x-y=2,求[(x²+y²)-(x-y)²+2y(x-y)]÷4y
(x+y)²-2(x²-y²)+(y-x)²
已知2x-y=10,求[(x²+y²)-(x-y)²+2y(x-y)]÷4y的值
(3x-2y)²(3x-2y)²(9x²+4y²)²
已知x²+4x+y²-10y+29=0 求【x+2y】÷【x²-2y²】的值
1.已知x/x-1=(y²+4y-1)/(y²+4y-2),则y²+4y-x的值为多少?
「(x²+y²)-(x-y)²+2y(x-y)」÷4y,其中2x-y=18
化简再求值[(x²+y²)²-4x²y²]÷(x²-y&su
化简:1.2x²-y²+(2y²-3x²)-(2y²+x²)