Can u explain, pls, why this programm is not working?

Question

A programm of solving quadratic equations
https://code.sololearn.com/cqXj33pgzobq/?ref=app

Answer 1

You used the character x to multiply values, but that doesn't work. Multiplication is performed by using an asterisk, e.g.
1 * 1
The compiler does not recognize the character x, so you should replace it by * in all equations.