数学题在线解答
因解分式:X²-2XY+Y²-Z²
x^2-2xy+y^2-z^2 =(x-y)^2-z^2 =(x-y+z)(x-y-z)。
X2-2XY+Y2-Z2=(X-Y)2-Z2 =(X-Y+Z)(X-Y-Z)
=(x-y-z)(x-y+z)
(x-y+z)(x-y-z)
解:原式=(X+Y)^2-Z^2 =(X+Y+Z)(X+Y-Z)
答:3x(a-b)-6y(b-a) =3ax-3bx-6by+6ay =3a(x+2y)-3b(x+2y) =(x+2y)(3a-3b) =3(a-b)(x+2y)详情>>
答:详情>>