MCQ
A quadratic equation ax2 + bx + c = 0 has two distinct real roots, if 
  • A
    a = 0
  • B
    b- 4ac = 0
  • C
    b2 - 4ac < 0
  • D
    b2 - 4ac > 0

Answer

  1. b2 - 4ac > 0

Solutions:

 

If a = 0, it becomes linear equation.

If b2 - 4ac = 0, then there will be real and equal roots.

If b2 - 4ac < 0, then the roots will be unreal.

Only if b2 - 4ac > 0, we will get two real distinct roots. 

Option D is correct!

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