If the roots of the equation ax^2 + bx + c are real and equal, what will be the relation between a, b, c?
(a) b = ±\(\sqrt {ac}\)
(b) b = ±\(\sqrt {4c}\)
(c) b = ±\(\sqrt {-4ac}\)
(d) b = ±\(\sqrt {4ac}\)
This question was addressed to me during an online exam.
My doubt is from Quadratic Equation topic in section Quadratic Equation of Mathematics – Class 10