Question

What is the square root of negative 45

Answer 1

$\sqrt{-45} = i\sqrt{45} = i\sqrt{9 \times 5} = i \sqrt{9} \times \sqrt{5} = 3i \sqrt{5}$

Answer 2

$\sqrt{-45} = i \sqrt{45} = i\sqrt{9} \times \sqrt{5} = 3i \sqrt{5}$