The first run solves the quadratic equation $x^2+2x-35=0,$ which has the real roots

$x=5$ and $x=-7.$

The input data for the second run results in the equation $0x^2+0x+16=0.$

Because it degenerates into the mathematical impossibility of $16=0,$ the program

identifies it correctly as a degenerate equation. As an exercise, you could create test

data for the other limiting cases the program checks for.