Question 191570
f(x)=3x^2-7x-11 
{{{ graph( 300, 200, -6, 5, -15, 10, 3x^2 -7x -11) }}} (graph 300x200 pixels, x from -6 to 5, y from -15 to 10, 3x^2 -7x -11). 
4x^2-7x-11
{{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}}
x=(7+-sqrt[-7^2-4*3-11])/2*3
x=(7+-sqrt[49+132])/6
x=(7+-sqrt181)/6
x=(7+-13.45)/6
x=(7+13.45)/6
x=20.45/6
x=3.41 ans.
x=(7-13.45)/6
x=-6.45/6
x=-1.075 ans.
x intercepts=(-1.075 & 3.41)