![(3a - 1.5)(3a + 1.5) (3a - 1.5)(3a + 1.5)](https://tex.z-dn.net/?f=%283a++-+1.5%29%283a+%2B+1.5%29)
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1
Answer:
(3a-1.5)(3a+1.5)
=(3a)²-(1.5)²
=9a²-2.25
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