Quadratic is that type of problem which deals with a variable multiplied by itself – an operation known also as squaring.
(iii)
Solution:
Given,
It’s of the form of
Where,
For the given quadratic equation to have real roots
⇒
⇒
⇒ and
⇒
The value of should be greater than or equal to to have real roots.
(iv)
Solution:
Given,
It can be rewritten as,
It’s of the form of
Where,
For the given quadratic equation to have real roots
⇒
⇒
⇒ and
⇒
The value of should be greater than or equal to to have real roots.