Question

http://prntscr.com/38pbax

Answer 1

Plug in 4.5 for x.
What do you get inside the root?

Answer 2

wouldn't it be 3?

Answer 3

No. Let's do it one step at a time.

Inside the root you have

\(2x - 5\)

First, we replace the x with 4.5.

\(2 \times 4.5 - 5\)

What do you get for that?

Answer 4

yeah its 4

Answer 5

Right.
Inside the root you have 4.

\(\sqrt{2x - 5}\)

\(=\sqrt{2 \times 4.5 - 5}\)

\(= \sqrt{9 - 5} \)

\(= \sqrt{4} \)

We are here now.

What is the square root of 4?

Answer 6

2

Answer 7

Correct.