Question

when do we use quadratic formula? Can we use it whenever we want or there are special conditions when we use them?

Answer 1

You can use the quadratic formula to solve any equation in the form \[\Large ax^2+bx+c=0\] where \[\Large a\neq 0\]

Answer 2

It can also be used with functions like this...

\[a(g(x))^2+b\cdot g(x)+c=0\]