Question

Find the value of $\lambda$ if ($\lambda$ - 5) ($\lambda$ + 3) < 0

• A. [-3, 5]
• B.
• C. (3,5)
• D. (-3, 5)

Answer 1

The correct option is D

(-3, 5)

We can solve this by wavy - curve method.

$\Rightarrow \lambda \in$ (-3, 5)

or we can consider ($\lambda$ - 5) ($\lambda$ + 3) as a quadratic. We know it is less than zero between the roots (-3 and 5).