16(x+y)2-9(x+y)2
(x+y)^2-16(x-y)^2
1、x(x-y)(x+y)-x(x+y)^2
因式分解 16(x-y)^2-9(x+y)^2
因式分解 (1).(x+y)(x+y-6)+9 (2).x²-16y²-x-4y
已知4x=9y求(1)x+y/y (2)y-x/2x
(1)(x^2/x)-y-x-y
【(x-y)^2+(x+y)(x-y)】除以 2x
化简:x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y)
[(-x-y)(-x+y)-(x+y)^2-x(y-y^2)}÷1/2y
化简求值:x/[9(x-y)^2]*[(x^2-y^2)/(x+y)]+{[(x^2+2)/(x+y)]-2}
x^2-y^2/x+y-4x(x-y)+y^2/2x-y,
(x+y)^2(x-y)^2-(x-y)(x+y)(x^2+y^2)分解因式