Question #e1762

1 Answer
Oct 21, 2017

x=+-10

Explanation:

For this question, sqrt(x^2-36)=8 have the form of square root which is not a good form to solve the question. So, first, we try to take square of both sides to eliminate the square root.

(sqrt(x^2-36))^2=(8)^2
x^2-36=64
x^2-100=0
(x+10)(x-10)=0
x=10 or x=-10