Answer:
(5a+4c)(2a-b)
Explanation:
Given the expression:

First, group the expression into two:

• In the first group, 5a is a common factor.
,
• In the second group, 4c is a common factor.
Factor these out by dividing each term by the GCF of each group.

Since the terms inside the brackets are the same, combine:

CHECK
To check if your result is correct in cases like these, expand as follows:

Our result is the same as the original question, hence, the work is correct.
I say less but if I’m wrong sorry
Answer:
9, 13, 22, 38, <u>63</u>, <u>99</u>
Step-by-step explanation:
13 = 9 + 2²
22 = 13 + 3²
38 = 22 + 4²
38 + 5² = 38 + 25 = 63
63 + 6² = 63 + 36 = 99
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