If the roots of equation $a x^{2}+b x+c=0, a
eq 0$ are real and equal, then which of the following

Question

If the roots of equation $a x^{2}+b x+c=0, a 
eq 0$ are real and equal, then which of the following relation is true?\

Professor PC Thomas Classes · Answer

(c): If the roots of the quadratic equation $a x^{2}+b x+c=0$ are real and equal, then discriminant $=0$\ $	herefore \quad b^{2}-4 a c=0$\ $\Rightarrow b^{2}=4 a c \Rightarrow a c=\frac{b^{2}}{4}$