Question 684891
Complete the square or use the quadratic formula
{{{x^2 + 8x + 16 = -1 + 16}}}
{{{(x+4)^2 = 15}}}
{{{sqrt(x+4)^2}}} = +/- {{{sqrt(15)}}}
x+4 = +/- {{{sqrt(15)}}}
{{{x=-4+-sqrt(15)}}}
so
x = {{{-4+sqrt(15)}}}
AND
x = {{{-4-sqrt(15)}}}
.....................
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