Question 1073600
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Solve {{{ 2sqrt(x+15)-2sqrt(x+3)}}} = {{{2 }}}.
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First step is

{{{ 2sqrt(x+15)}}} = {{{2 + 2sqrt(x+3)}}}.


Now square both sides. You will get

4*(x + 15) = {{{4 + 8sqrt(x+3) + 4*(x+3).}}}

Simplify

4x + 60 = {{{4 + 4x + 12 +  8sqrt(x+3)}}},

44 = {{{8*sqrt(x+3)}}},

11 = {{{2*sqrt(x+3)}}}.


What to do next ? - But of course, square both sides again !


I am sure that you can complete it on your own from this point.
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