Question

How do you factor (2r+s)(2r-s) + (2r +s)(r-s)?

Answer 1

use the distributive property that
ab + ac = a(b+c)

Answer 2

so, (2r+s)(2r-s) + (2r +s)(r-s)
= (2r+s)(2r-s + r-s)
simplify it and u get its factors