Question 464608
{{{sqrt(x+8)-8=x}}}
{{{sqrt(x+8)=x+8}}}
square both sides to get:
{{{x+8=(x+8)^2}}}
{{{x+8=(x+8)(x+8)}}}
{{{x+8=x^2+16x+64}}}
{{{8=x^2+15x+64}}}
{{{0=x^2+15x+56}}}
factoring:
{{{0=(x+8)(x+7)}}}
x = {-8, -7}