SOLUTION: I'm needing some help with the following problem: Factor each completely. Some may require several steps. a^4-16 thanks!

Question 186371: I'm needing some help with the following problem: Factor each completely. Some may require several steps.
a^4-16
thanks!
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
In this problem, I'll be using the difference of squares formula, which is:

Start with the given expression.

Rewrite as . Rewrite as

Use the difference of squares formula to factor.

Rewrite as .

Use the difference of squares formula to factor.

So completely factors to
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