Factor
\left(5a^{2}-1\right)^{2}
Evaluate
\left(5a^{2}-1\right)^{2}
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\left(5a^{2}-1\right)^{2}
Use the perfect square formula, p^{2}-2pq+q^{2}=\left(p-q\right)^{2}, where p=5a^{2} and q=1. Polynomial 5a^{2}-1 is not factored since it does not have any rational roots.
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