因式分解x^2-2xy-3y^2+8y-4_数学解答

因式分解x^2-2xy-3y^2+8y-4

人气：319 ℃　时间：2020-01-23 19:17:55

解答

原式=(x²-2xy+y²)-(4y²-8y+4)
=(x-y)²-(2y-2)²
=(x-y+2y-2)(x-y-2y+2)
=(x+y-2)(x-3y+2)