x的平方-y的平方+ax+ayx²-y²+ax+ay=(x+y)(x-y)+a(x+y)=(x+y)(x-y+_数学解答

x的平方-y的平方+ax+ay
x²-y²+ax+ay
=(x+y)(x-y)+a(x+y)
=(x+y)(x-y+a)
=(x+y)(x-y+a)这里看不懂求解

人气：398 ℃　时间：2020-04-01 12:32:42

解答

提取公因式
=(x+y)(x-y)+a(x+y)
=(x+y)[(x-y)+a]
=(x+y)(x-y+a)