Factor
\frac{\left(39x-1\right)\left(39x+1\right)}{169}
Evaluate
9x^{2}-\frac{1}{169}
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\frac{1521x^{2}-1}{169}
Factor out \frac{1}{169}.
\left(39x-1\right)\left(39x+1\right)
Consider 1521x^{2}-1. Rewrite 1521x^{2}-1 as \left(39x\right)^{2}-1^{2}. The difference of squares can be factored using the rule: a^{2}-b^{2}=\left(a-b\right)\left(a+b\right).
\frac{\left(39x-1\right)\left(39x+1\right)}{169}
Rewrite the complete factored expression.
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