SOLUTION: Factor completely 16x^4 – 40x^2 + 9

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Question 177960: Factor completely 16x^4 – 40x^2 + 9
Answer by Mathtut(3670) About Me  (Show Source):
You can put this solution on YOUR website!
16x%5E4-40x%5E2%2B9
:
highlight%28%284x%5E2-1%29%284x%5E2-9%29%29
:
remember the leading term is just a multiple of the 1st terms of the factors
and the constant terms is just a multiple of the last terms of the factors.
:
That is where you begin. One just starts playing with combinations that will equal the middle term when multiplied together.