Question 46512
3x^2 + 12x = -5
x^2 + 4x = -5/3
(x + 2)^2 = -5/3 + 12/3 = 7/3
x + 2 = +- sqrt(7/3)
x = -2 +- sqrt(7/3)
{{{graph(600,600,-10,10,-10,10,3x^2 + 12x,-5)}}}