Day 2 square roots
13
Warm up 3 4 5 A farmer knows he needs to grow an area of 81 km 2 of corn to make a profit. His field is a square. How long are the sides of his corn field?
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Transcript of Day 2 square roots
![Page 1: Day 2 square roots](https://reader033.fdocuments.us/reader033/viewer/2022061210/5490ddc2b47959357b8b49ef/html5/thumbnails/1.jpg)
Warm up
3 4
5
A farmer knows he needs to grow an area of 81 km2 of corn to make a profit. His field is a square. How long are the sides of his corn field?
![Page 2: Day 2 square roots](https://reader033.fdocuments.us/reader033/viewer/2022061210/5490ddc2b47959357b8b49ef/html5/thumbnails/2.jpg)
Warm up correction
![Page 3: Day 2 square roots](https://reader033.fdocuments.us/reader033/viewer/2022061210/5490ddc2b47959357b8b49ef/html5/thumbnails/3.jpg)
Homework correction
![Page 4: Day 2 square roots](https://reader033.fdocuments.us/reader033/viewer/2022061210/5490ddc2b47959357b8b49ef/html5/thumbnails/4.jpg)
So, what is
a ratio
nal number a
gain?
![Page 5: Day 2 square roots](https://reader033.fdocuments.us/reader033/viewer/2022061210/5490ddc2b47959357b8b49ef/html5/thumbnails/5.jpg)
Are the following numbers rational?Why?
-7/10
-12
2.34
0.666....
0.172458917245891724589....
![Page 6: Day 2 square roots](https://reader033.fdocuments.us/reader033/viewer/2022061210/5490ddc2b47959357b8b49ef/html5/thumbnails/6.jpg)
So, are all numbers rational then?
![Page 7: Day 2 square roots](https://reader033.fdocuments.us/reader033/viewer/2022061210/5490ddc2b47959357b8b49ef/html5/thumbnails/7.jpg)
![Page 8: Day 2 square roots](https://reader033.fdocuments.us/reader033/viewer/2022061210/5490ddc2b47959357b8b49ef/html5/thumbnails/8.jpg)
Square root of a number
Square of a number a:
The number times itself : axa = a2
Examples:
![Page 9: Day 2 square roots](https://reader033.fdocuments.us/reader033/viewer/2022061210/5490ddc2b47959357b8b49ef/html5/thumbnails/9.jpg)
Square root of a positive number b:
·a number c so that c2= b
·Each positive number has a positive and negative square root
·The notation for the positive square root of a number is √
Example:
![Page 10: Day 2 square roots](https://reader033.fdocuments.us/reader033/viewer/2022061210/5490ddc2b47959357b8b49ef/html5/thumbnails/10.jpg)
Perfect squares
![Page 11: Day 2 square roots](https://reader033.fdocuments.us/reader033/viewer/2022061210/5490ddc2b47959357b8b49ef/html5/thumbnails/11.jpg)
![Page 12: Day 2 square roots](https://reader033.fdocuments.us/reader033/viewer/2022061210/5490ddc2b47959357b8b49ef/html5/thumbnails/12.jpg)
Applications with partner
![Page 13: Day 2 square roots](https://reader033.fdocuments.us/reader033/viewer/2022061210/5490ddc2b47959357b8b49ef/html5/thumbnails/13.jpg)