Question 1038671

What values of "a" does the function f(x)=ax^2+6x+9 have two zeros, have one zero, have no zero's

thank you :)
<pre>Two zeroes:{{{matrix(1,5, Discriminant, or, b^2 - 4ac, ">", 0)}}}
One zero:  {{{matrix(1,5, Discriminant, or, b^2 - 4ac, "=", 0)}}}
No zeroes: {{{matrix(1,5, Discriminant, or, b^2 - 4ac, "<", 0)}}}