Factor 25+45. Write your answer in the form a(b+c) where a is the GCF of 25 and 45.
To factor 25+45, we first find the greatest common factor (GCF) of 25 and 45, which is 5. Then we divide 25 and 45 by 5 to get:
25 ÷ 5 = 5
45 ÷ 5 = 9
So now we have:
25+45 = 5×5 + 5×9
We can factor out the common factor of 5 to get:
25+45 = 5(5+9)
Therefore, the answer is 5(5+9).