>>16754712
https://www.wolframalpha.com/input?i=Solve%5B%7Bk+%3D%3D+a+h%5E2+%2B+b+h+%2B+c%2C+0+%3D%3D+2+a+h+%2B+b%2C+v+%3D%3D+a+u%5E2+%2B+b+u+%2B+c%7D%2C+%7Ba%2C+b%2C+c%7D%5D