Question

Find the solution to
sqrt (x+10^-9 )=-7

Answer 1

\(\large \bf (\sqrt{x+10^{-9}})^2=(-7)^2\implies ?\)

Answer 2

once you raise both to 2nd power... should be simple
keep in mind that \(\large \bf a^{-{\color{red} n}} \implies \cfrac{1}{a^{\color{red} n}}\)