## Elementary Algebra

$(6a-5b)(6a+5b)$
The given expression can be written as: $(6a)^2-(5b)^2$ RECALL: A difference of two square can be factored using the formula: $x^2-y^2=(x-y)(x+y)$ Use the formula above with $x=6a$ and $y=5b$, we obtain: $= (6a-5b)(6a+5b)$