Factorize completely 81a4 - 16b4
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Correct Answer: Option C
Explanation:
81a4 - 16b4 = (9a2)2 - (4b2)2
= (9a2 + 4b2)(9a2 - 4b2)
N:B 9a2 -Â 4b2 = (3a - 2b)(3a +Â 2b)
81a4 - 16b4 = (9a2)2 - (4b2)2
= (9a2 + 4b2)(9a2 - 4b2)
N:B 9a2 -Â 4b2 = (3a - 2b)(3a +Â 2b)