SOLUTION: Factor completely 16x4 – 40x2 + 9

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Question 167810: Factor completely 16x4 – 40x2 + 9
Answer by padmameesala(42) About Me  (Show Source):
You can put this solution on YOUR website!
16x^4 - 40x^2 + 9
= 16x^4 - 36x^2 - 4x^2 + 9
= 4x^2(4x^2 - 9) - 1(4x^2 - 9)
= (4x^2 - 9)(4x^2 - 1)
= (2x + 3)(2x - 3)(2x + 1)(2x - 1)