Question

Evaluate :

$\sqrt{-25}+3\sqrt{-4}+2\sqrt{-9}$

• A. $-17i$
• B. $5i$
• C. $17i$
• D. $6i$

Answer 1

The correct option is C $17i$

$\sqrt{-25}+3\sqrt{-4}+2\sqrt{-9}$

$=5\sqrt{-1}+6\sqrt{-1}+6\sqrt{-1}$ we know, $\sqrt{-1}=i$

$=5i+6i+6i=17i$