Which one of the following quadratic equations has two equal real roots?

MATHEMATICS · Single correct · CBSE · Mathematics · Quadratic Equations · Quadratic Equations

Problem

Which one of the following quadratic equations has two equal real roots? (a)

x^2+4x+5=0

(b)

x^2+4x+1=0

(c)

x^2+4x+4=0

(d)

x^2+5x+4=0