ECAT Engineering Exams Quizzes MCQs Quizzes ECAT Engineering Entry Test 2017 Mathematics Quadratic Equations

Question:
The quadratic formula is

Option A):
x = - b ± √b² - 4ac/2a
Option B):
None of these
Option C):
x = - b ± √b² - 4ac/a
Option D):
x =  b ± √b² - 4ac/a

Correct Answer is Option A):
x = - b ± √b² - 4ac/2a