SOLUTION: Factor completely 7a^2 – 28b^2

Algebra.Com
Question 189833: Factor completely
7a^2 – 28b^2

Answer by jim_thompson5910(35256)   (Show Source): You can put this solution on YOUR website!
Start with the given expression


Factor out the GCF 7


Rewrite as


Factor to get (note: use the difference of squares formula)


So completely factors to

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