(3x-2y)²(3x+2y)²(9x²+4y²)²=?
(2x-y)²-4(x-y)(x+2y)
化简:(2x-y)²-4(x-y)(x+y)
(3x-y)²-2x(4x-5y)-(x+2y)²
先化简再求值:(x-2y)²-(x+2y)(x-2y)-(x-3y)(x-y).其中x²+9y
(x+y)和(x-y)各看成一个整体,合并同类项2(x+y)-3(x-y)²+3(x+y)+4(x-y)
急![(3x+y)²-3(3x-y)(x+y)-(x-3y)(x+3y)]÷(2xy)
(x-y)X(2x-2y)²X(3x-3y)²
已知x,y为实数,且2(x+2y)=x²+y²+5求代数式3x-4y分之x²+y²
9(3x-2y)²-(x-y)²,因式分解
(x-2y)²-(3x+4y)²
因式分解:X²-Y²+2X-4Y-3
因式分解 (4x+3y)²-(2x+y)²