Question 299008
 f(x)=4x^2+12x+3
{{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}} 
x=(-12+-sqrt[12^2-4*4*3])/2*4
x=(-12+-sqrt[144-48])/8
x=(-12+-sqrt96)/8
x=(-12+-9.798)/8
x=(-12+9.798)/8
x=2.202/8
x=.275 ans.
x=-12-9.798)/8
x=-21.798/8
x=-2.725 ans.
Y intercept=3.
{{{ graph( 300, 200, -6, 5, -10, 10, 4x^2 +12x +3) }}} (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, 4x^2 +12x +3).