Question 954033
The value for P does not matter  -  Maybe.


{{{(x+2)(x-1/2)=0}}}
{{{x^2+2x-x/2-1=0}}}
{{{x^2+(3/2)x-1=0}}}


The question just specified REAL values of P, Q, and R.
{{{system(P=1,Q=3/2,R=-1)}}}.


The entire system can be multiplied by any real number factor and will still work.
Your equation can also be {{{y=2x^2+3x-2}}}.