Answer
(m+15)(m-15)
Work Step by Step
We use the formula for the difference of squares to apply to this question.
The difference of squares formula is:
$(a-b) (a+b) = a^{2} - b^{2}$
= $(m)^{2}$ - 225 *** Take the square root of 225 which is 15. Becuase 15 × 15= 225
= $(m)^{2}−15^{2}$
In the given formula let m represents a and 15 represents b.
$(m)^{2}−15^{2}$ = (m+15)(m-15)