Question

Find the real-number root.sqrt -1.21Options:-0.6051.1-1.1or no real number root

Answer 1

Given:

`√(-1.21)`

You need to remember this property for Radicals:

`\sqrt[n]{b^n}=b`

You know that:

`121=11\cdot11=11^2`

Therefore, you can conclude that:

`1.21=1.1^2`

Hence, you can rewrite the expression as follows:

`=\sqrt[]{-(1.1)^2}`

By definition:

`\sqrt[]{-1}=i`

Then, you can rewrite it as:

`=1.1i`

Therefore, it is an Imaginary Root.

Hence, the answer is: Last option.