Question

If ${ax}^2+bx+c=0,c\ne 0$ has equal roots, then what is the value of $c$?

Answer 1

$a{x}^2+bx+c=0$

If equation has equal roots then discriminant $b^2-4ac=0$

$b^2=4ac$

$\therefore c=\frac{b^2}{4a}$