(x-2y)²(x+2y)² )
(x+y)²-2(x²-y²)+(y-x)²
化简:1.2x²-y²+(2y²-3x²)-(2y²+x²)
(3x-2y)²(3x-2y)²(9x²+4y²)²
求一道计算题,{(2\3x²)-(2\x²+y²)*[(x²+y²\3
1、x²+4y²+_______=(x-2y)²
(x²+4y²)²-16x²y² 因式分解
设P(x,y)是圆x²+y²+8y+12=0上的一点,√(x²+y²-2x-2y
化简再求值[(x²+y²)²-4x²y²]÷(x²-y&su
因式分解:16(x-y)²-9(x-y)² 用简便方法计算 202²-54²+2
y=(x²+1)²/[(3x²+2)(2x²+3)],求最小值
计算:(2x+y-1)²
先化简,再求值:(x²)/(x²-2xy+y²)÷(x²+2xy+y²)/(x&