Answer
$$x=2,\:x=1$$
Work Step by Step
Using the rules of Algebra, we find:
$$\left(\sqrt{15x+34}\right)^2=\left(x+6\right)^2\\ 15x+34=x^2+12x+36 \\ x^2-3x+2=0 \\ x=2,\:x=1$$
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