Question 1 Report
Factorize completely 81a4 4 - 16b4
Answer Details
81a4 4 - 16b4 4 = (9a2 2 )2 2 - (4b2 2 )2 2 = (9a2 2 + 4b2 2 )(9a2 2 - 4b2 2 ) N:B 9a2 2 - 4b2 2 = (3a - 2b)(3a + 2b)
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