Expert Answers

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(x^2 -9)^1/2 = 4

First we will square both sides:

==> ((x^2 -9)^1/2)^2 = 4^2

==> (x^2 -9) = 16

Now add 9 to both sides:

==> x^2 = 25

==> x= +-5

 

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