1. I can find square roots and compare real numbers.
Section 2.7
I can find square roots and compare real numbers.

2. Review…
7 –(6x – 9) =

3. How am I written?
A square root is written with a radical symbol….. √ The number under the radical symbol is called the ____________________.

4. The square root only has one square root…….. ________________
What about zero?
The square root only has one square root…….. ________________

5. Evaluate the expressions…
± √ 36 =
√ 49 =
- √ 36 =
√ - 36 =

6. Square root of a negative...
Can you do it?!?!
In further math classes…this is called an _______________ number---it doesn’t exist!

7. Perfect Square… 9
The square of an integer is called the perfect square.
What does it mean to be an integer? 9

8. Word Problems…
If you want to buy a square wall poster of the CHICAGO CUBS….That has an area of 225 square feet. Find the side length of the wall poster! ? ?

9. Approximating the square root to the nearest integer….
± √ 39
± √15
± √ 51