Question

Express the radical using the imaginary unit, i

Express your answer in simplified form.
tv-49 =

Answer 1

7i.

Explanation:

Note : The given expression must be
`√(-49)`.

We have to write this radical value in the imaginary value.

The given value can be rewritten as

`√(-49)=√(49* (-1))`

`√(-49)=√(49)* √(-1)`
`[\because √(ab)=√(a)√(b)]`

`√(-49)=7* i`
`[\because √(-1)=i]`

`√(-49)=7i`

Therefore, the required expression is 7i.