Question 1115737
This works the same way as the other question from a few minutes ago.  Discriminant must equal 0.



SET THE DISCRIMINANT EQUAL TO 0.

For quadratic equation in variable p,
{{{a*p^2+bp+c=0}}}


The discriminant is  {{{b^2-4*a*c}}}


If solution of the quadratic equation is for one rational value for p then  {{{b^2-4ac=0}}}.