Question 179456
Solve using completing the square:
{{{x^2+6x+4=0}}}
---------------
x^2 + 6x +? = -4 + ?
x^2 + 6x + 9 = -4 + 9
(x+3)^2 = 5
-----
x+3 = sqrt(5) or x+3 = -sqrt(5)

x = -3 + sqrt(5) or x = -3 - sqrt(5)
=======================================
Cheers,
Stan H.