Factor
\left(-6y-5\right)\left(6y-5\right)
Evaluate
25-36y^{2}
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\left(5-6y\right)\left(5+6y\right)
Rewrite 25-36y^{2} as 5^{2}-\left(6y\right)^{2}. The difference of squares can be factored using the rule: a^{2}-b^{2}=\left(a-b\right)\left(a+b\right).
\left(-6y+5\right)\left(6y+5\right)
Reorder the terms.
25-36y^{2}
Calculate 5 to the power of 2 and get 25.
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