Question

Find the greatest common factor 28 and 12

use the GCF to factor 28+12.

Answer 1

(a) 4

(b) 4 * (7+3)

Explanation:

(a) Let's first start by prime factorizing (finding the prime factors) 28 and 12:

12: 2*2*3

28: 2*2*7

We can see here they both share a common factor of 2*2, which is 4, therefore the GCF is 4.

(b) Factor a 4 out from the equation:

`4*((28)/(4)+(12)/(4))`

This gives us:

4 * (7+3)