Expert Answers

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sqrt(2x+6) = 4

First we need to square both sides:

==> [sqrt(2x+6)]^2 = 4^2

==> 2x + 6 = 16

==> 2x = 10

==> x = 5

Let us substitute to make sure that the function is defined for x=5:

==> sqrt(2x +6) = 4

==> sqrt(2*5+6) = 4

==> sqrt(16) = 4

==> 4= 4

Then the sloution is x= 5

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