Eliminate the parameter t to find a Cartesian equation for:

x=t2\displaystyle {x}={t}^{{2}}

y=9+5t\displaystyle {y}={9}+{5}{t}

The resulting equation is:
x=Ay2+By+C\displaystyle {x}={A}{y}^{{2}}+{B}{y}+{C}
where
A =  

and B =  

and C =