shyanndillon1 shyanndillon1

05-10-2017
Mathematics

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Factor 16x 4 – 81 completely. First factor each term. 16x 4 = (___)2 81 = _ 2 Then use a2 – b2 = (a – b)(a + b) twice. Show your work. 16x 4 – 81 =

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texaschic101 texaschic101

05-10-2017

16x^4 - 81

16x^4 = (4x^2)^2
81 = 9^2

16x^4 - 81 =
(4x^2 - 9) (4x^2 + 9) <==

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