Question 140885
Solve using the square root property:
(x + 4)^2 = 81 
This means taking the square root of both sides.  When you do this, you have to remember to include the + or -:
{{{(x+4)=0 +- 9}}}
{{{ x=-4 +- 9}}}
{{{x=-4+9}}} or {{{x=-4-9}}}
{{{x=5}}} or {{{x=-13}}}


Solve by completing the square:
{{{x^2 + 6x + 2 = 0}}}

{{{x^2 + 6x  = -2}}}
{{{x^2 +6x+9=-2+9}}}
{{{(x+3)^2=7}}}
{{{(x+3)=0+- sqrt(7)}}}
{{{ x=-3+-sqrt(7)}}}


R^2