Question 687913
Step 1:  Combine like terms  (add 6 and subtract 1 from both sides): {{{-2(x+5)^2 = 20}}}.

Divide both sides by -2:  {{{(x+5)^2 = -10}}}  The equation is now factored into a solvable form.<P>
Square root both sides:  {{{(x+5) = -sqrt(-10)}}} and{{{(x+5)=sqrt(-10)}}} --->  {{{x+5 = i*sqrt(10)}}} and {{{x+5 = -i*sqrt(10)}}} subtract 5 from both sides {{{x = -5+ i*sqrt(10)}}}and {{{x = -5- i*sqrt(10)}}}
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