How to factor the algebraic expression 24a + 28

So use undistributive properyt]

ab+ac=a (b+c)

so factor 24a dadn 28 to find 'a' the common factor

24=2 times 2 times 2 times 3 tiems a

28=2 times 2 times 7

common one is 2 itmes 2=4

a=4

4 (2 times3 times a) + 4 (7) = 4 (6a) + 4 (7) = 4 (6a+7)