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AKA Radical - PowerPoint PPT Presentation

Square Root. √. AKA Radical. Fact: You can have a single number 8 that represents a distance. Ex. 8 in. Fact: You can create a square using 2 of these segments. 8 in 8 in. Soon you see that 8 alone is a distance.

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Presentation Transcript

Square Root

Fact: You can have a single number 8 that represents a distance. Ex.

8 in

• Fact: You can create a square using 2 of these segments.
• 8 in
• 8 in

Soon you see that 8 alone is a distance.

8 x 8 makes a square

8 x 8 = 64 squares.

82 = 64

To square something, look for the exponent of 2.

4 2 = 4 x 4 = 16

10 2 = 10 x 10 = 100

(-3)2 = -3 x -3 = 9

-32 = - (3 x 3) = -9

A square root is the opposite and UNDOES the squaring.

This is easy if you know your times tables well. . .

This also works with variables

Comment here on negatives!