(x²-y²+x+y)÷(x+y)
化简再求值[(x²+y²)²-4x²y²]÷(x²-y&su
(x+y)²-2(x²-y²)+(y-x)²
化简:1.2x²-y²+(2y²-3x²)-(2y²+x²)
(x²+4y²)²-16x²y² 因式分解
因式分解: 16(x-y)²-9(x+y)²
分解因式 x²(x²-y²)+z²(y²-x²) (a+b)
(x²-y²+x+y)÷(x+y)
(3x-2y)²(3x-2y)²(9x²+4y²)²
「(x²+y²)-(x-y)²+2y(x-y)」÷4y,其中2x-y=18
已知2x-y=10 【(x²+y²)-(x-y)²+2y(x-y)】÷4y 过程
2x-y=10 【(x²+y²)-(x-y)²+2y(x-y)】÷4y
求一道计算题,{(2\3x²)-(2\x²+y²)*[(x²+y²\3