Square and Cube Roots MRS. RAUCH. How do we square a number? Can we square negative numbers?
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Transcript of Square and Cube Roots MRS. RAUCH. How do we square a number? Can we square negative numbers?
![Page 1: Square and Cube Roots MRS. RAUCH. How do we square a number? Can we square negative numbers?](https://reader035.fdocuments.net/reader035/viewer/2022081513/5697c0211a28abf838cd2ce6/html5/thumbnails/1.jpg)
Square and Cube RootsMRS. RAUCH
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How do we square a number?
Can we square negative numbers?
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Square Roots
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Square Roots
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Perfect Squares
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What does cubing a number mean?
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Cubing a number
To cube a number, you just multiply that number by itself 3 times
Example: 3 cubed is or 3 x 3 x 3The little 3 means the number appears
3 times when multiplying
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Practice with cubes
4 cubed
5 cubed
6 cubed
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Cube Roots
A cube root goes the other direction
3 cubed is 27 so the cube root of 27 is 3
The cube root of a number is a special value that when cubed gives the original number
The cube root of 27 is 3 because when 3 is cubed you get 27
When you see “root” think……I know the tree but what is the root that produced it?
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Practice with Cube Roots
What is the cube root of 125?
What is the cube root of 8?
What is the cube root of 1000?
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The cube root sign
This is a special symbol that means “cube root”, it is the radical symbol (used for square roots) with a little 3 to mean cube root
You can use it like this…. = 3 We say, “the cube root of 27 is 3
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Can you cube negative numbers?
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Cubing Negative Numbers
When we cube 5 we get…. When we cube -5 we get…
So can cube roots be negative?
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Perfect Cubes
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