(2a+3)(2a-3)(4a square +9)
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Step-by-step explanation:
2a+3)(2a-3)(4a+9)
(a+b)(a-b)=a²-b²
=(2a+3)(2a-3)(4a+9)
=(4a²-9)(4a+9)
= (4a²*4a)-(4a²*9)-(9*4a)-(9*9)
=16a³-36a²-36a-81
:) pls mark as brainliest
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