pls do it fast pls the answer is (a+b)(4a-b)
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Answer:
(a+b)(4a-b)
Step-by-step explanation:
(a+b)(2a+b) + (3a+2b)(a+b) - (a+b)(a+4b)
= 2a²+2ab+ab+b²+3a²+2ab+3ab+2b²-a²-ab-4ab-4b²
= 5a²-a²+8ab-5ab+3b²-4b²
= 4a²+3ab-b²
= 4a²+4ab-ab-b²
= 4a(a+b)-b(a+b)
= (a+b)(4a-b)
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