(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Completely factor:

$$5abc^4-80ab$$

2. Relevant equations

N/A

3. The attempt at a solution

$$5abc^4-80ab$$

$$5ab\left(c^4-16\right)$$

$$5ab\left(c^2+4\right)\left(c^2-4\right)$$

The correct solution is##5ab\left(c^2+4\right)\left(c+2\right)\left(c-2\right)##

I can see why it factored out the##\left(c^2-4\right)##further, but why isn't it required to do so with the##\left(c^2+4\right)##as well?

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# Homework Help: Factoring Involving the Difference of Two Squares

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