Question

Express the radical using the imaginary unit, i.

Express your answer in simplified form.


±√-9= ±


√=square root of -9

Answer 1

±3i

Explanation:

Given the value ±√-9, we are to express the value using the imaginary number 'I'

±√-9 = ±√9×-1

= ±√9 × √-1

In complex number, √-1 = i

The expression becomes;

±√9 = ±3 × i

±√9 = ±3i

Hence the value in simplified form is ±3i