X^2 - 25 is a difference of squares which has a special factorization.
In general, a^2 - b^2 = (a + b)(a - b)
x^2 - 25 = 0
(x + 5)(x - 5) = 0
x + 5 = 0 or x - 5 = 0
x = -5 or x = 5
The answer is 77 multiply and add them
Answer:
Lateral Area of a Cylinder = 2πrh
=2π x 3 x 6
=36π
Option D