您好: x的2次方-4*y的2次方+2x-4y=x²-(2y)²+2(x-2y)=(x-2y)(x+2y)+2(x-2y)=(x-2y)(x+2y+2)如有不明白,可以追问如有帮助,记得采纳,谢谢 祝学习进步!
x²-4y²+2x-4y=(x+2y)(x-2y)+2(x-2y)=(x-2y)(x+2y+2)
x^2-4y^2+2x-4y=(x+2y)(x-2y)+2(x-2y)=(x-2y)(x+2y+2)