Question

Can someone tell me if I got this geometry question right? Find the value of x and write answers in simplest radical form using Pythagorean theorem.

Answer 1

`2√(21)`

Explanation:

I'm not sure if you know how to simplify radicals or not, but the
`√(84)` can be further simplified to
`2√(21)`

To simplify a radical, you just need to divide by squares you already know

In this case, divide 84 by 4 (which is the square of 2)

This will give you 21. Leave that inside the radical. Outside the root, leave the 2 as multiplier to
`√(21)`.