Factor 28+49. Write your answer in the form a(b+c) where a is the GCF of 28 and 49.
To factor 28 + 49, we need to find the greatest common factor (GCF) of 28 and 49, which is 7.
Then we can rewrite 28 + 49 as follows:
28 + 49 = 7(4 + 7)
Therefore, 28 + 49 can be factored as 7(4 + 7).