SOLUTION: What is the solution if (a-4b+c)(a+4b+c) by using special products formulas

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Question 976911: What is the solution if (a-4b+c)(a+4b+c) by using special products formulas
Answer by josgarithmetic(39623) About Me  (Show Source):
You can put this solution on YOUR website!
Maybe with some commutativity there is one special product to use.

%28a-4b%2Bc%29%28a%2B4b%2Bc%29
%28a%2Bc-4b%29%28a%2Bc%2B4b%29
%28a%2Bc%29%5E2-%284b%29%5E2------used Difference of Two Squares Formula
and then
a%5E2%2B2ac%2Bc%5E2-16b%5E2------included the square binomial