Answer
(a+7)(a-7)
Work Step by Step
We use the formula for the difference of squares to apply to this question.
The difference of squares formula is:
$(a-b) (a+b) = a^{2} - b^{2}$
= $(a)^{2}$ - 49 *** Take the square root of 49 which is 7. Becuase 7 $\times$ 7= 49
= $(a)^{2} - 7^{2}$
In the given formula let a represents a and 7 represents b.
$(a)^{2} - 7^{2}$ = (a+7)(a-7)
