Answer
$7h^{2} - 4$
Work Step by Step
We use the formula for the difference of squares to apply to this question.
The difference of squares formula is:
$(a-b) (a+b) = a^{2} - b^{2}$
In the given formula let 7h represents a and 2 represents b.
$(7h-2) (7h+2) = (7h)^{2} - 2^{2}$
= $7h^{2} - 4$
