# Question: Root in the Denominator

## Comment on Root in the Denominator

### calculation on 01:27 is not

calculation on 01:27 is not clear. Am adding 2+2-1-3 should give me 0 not -1. please explain how you got the -1 when you simplify. thanks

### When simplifying expressions,

When simplifying expressions, we need to add like terms.
For example, 2x + 2y - y - 3x simplifies to be x - y. We combine the 2x and -3x separately and we must combine 2y and -y separately.
You are combining ALL of the terms.

So, when simplifying 2 + 2√3 - √3 - 3, we must combine the two like terms 2√3 and -√3. We get 1√3.
Then we combine 2 and -3 to get -1
So, altogether, 2 + 2√3 - √3 - 3 = -1 + √3
Does that help?

### do you believe we have enough

do you believe we have enough time on the test day to perform such calculations?

### Yes, you should have enough

Yes, you should have enough time . . . as long as it doesn't take you too long to see what steps are required.

### Please which module did you

Please which module did you teach conjugate roots

### It's lesson #29 in this

It's lesson #29 in this module. Here's the link: https://www.greenlighttestprep.com/module/gre-powers-and-roots/video/1049

Cheers,
Brent