Answer:
5(9b+8)
Explanation:
You have to see what numbers equally go into 45 and that would be 9 and 5, and then you see what numbers will go into 40 and that is 8 and 5.
5(9b + 8)
Rewrite 45 as 5 * 9
Rewrite 40 as 5 * 8
= 5 * 9b + 5 * 8
Factor out common term 5
=5 (9b + 8)
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