16x²-9y²-4x-3y
化简 3(X-Y)²-4(X-Y)+7(X-Y)-6(X-Y)²
因式分解:(x-y)(3x-7y)²-4(x-y)(x+y)²
因式分解 (1).(x+y)(x+y-6)+9 (2).x²-16y²-x-4y
(x-y)³+9(x-y)-6(x-y)²
(2x-y)²-4(x-y)(x+2y)
化简:(2x-y)²-4(x-y)(x+y)
(x+y)²+4(x+y)-5
(3x-y)²-2x(4x-5y)-(x+2y)²
已知x,y满足x²+y²-4x+6y+13=0则(3x+y)²-(3x+y)(3x-y)的
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)
因式分解:(1)x²+x (2)4x²-9y (3)x²y-4y