(3a+2b)×(9a^2+4b^2)×(3a-2b)
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Answer: 81a⁴-16b⁴
Step-by-step explanation:
(3a+2b)×(9a²+4b²)×(3a-2b)
(3a+2b)×(3a-2b)×(9a²+4b²)
[(3a)²-(2b)²]×(9a²+4b²) { Using the formula (a+b)(a-b)=a²-b²
(9a²-4b²) ×(9a²+4b²)
Again using the formula (a+b)(a-b)=a²-b²
(9a²)²- (4b²)²
=81a⁴-16b⁴
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