= square of radical x plus y/radical x plus radical y

= radical X+ radical y

2 Original formula = (number of roots A+number of roots B)/(number of roots A+number of roots B ab)+ (number of roots a+2) Quadratic/(number of roots a-2a)

= root number a+ root number b+ (root number a+2) quadratic /a

Ps, you don't understand the second formula. You did it according to your own understanding. If only you could type it clearly, OvO.