Answer
$(5k - 7)(5k + 7)$
Work Step by Step
This expression features the difference of two squares. The formula for factoring the difference of two squares is the following:
$a^2 - b^2 = (a - b)(a + b)$
In our expression, $a = 5k$ and $b = 7$.
Let's rewrite our expression in factored form:
$(5k - 7)(5k + 7)$
