Question 299969
x-intercepts occur where {{{f(x) = 0}}}
The quadratic equation is
{{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}}
when the equation is in the form
{{{f(x) = ax^2 + bx + c}}} 
{{{a = 3}}}
{{{b = 0}}}
{{{c = 0}}}
{{{x = (-0 +- sqrt( 0^2-4*3*0 ))/(2*3) }}} 
{{{x = sqrt(0/6)}}}
{{{x = 0}}}
The only x-intercept is at {{{x = 0}}}