x(x+y)(x-y)-x(x+y)^2怎样分解因式
怎样分解因式
x(x+y)(x-y)-x(x+y)^2 =x(x+y)(x-y)-x(x+y)(x+y) =x(x+y)(x-y-x-y) =-2xy(x+y)
x(x+y)(x-y)-x(x+y)^2 =x(x^2-y^2)-x(x^2+y^2+2xy) =-2x(y^2+xy) =-2xy(x+y)
x(x+y)(x-y)-x(x+y)^2提公因式x(x+y) 结果等于-2xy(x+y)
答:(x+y)^2=9,(x-y)^2=4,两式相加,x^2+y^2=13/2详情>>
答:详情>>