Question #e1762

1 Answer
Yiu A.
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#

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