Question

x+y的平方-2a-2b-12怎么因式分解,

Answer 1

首先我觉得你的题目给错了,前面x和y,后面a和b,我就按照a=x,b=y来做了

(x+y)^2-2(x+y)-12

=(x+y)^2-2(x+y)+1-13

=(x+y-1)^2-13

=(x+y-1+√13)(x+y-1-√13)

希望你能看明白,如果看明白请采纳