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AKA Radical

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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AKA Radical

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  1. Square Root √ AKA Radical

  2. 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

  3. Soon you see that 8 alone is a distance. 8 x 8 makes a square 8 x 8 = 64 squares. 82 = 64

  4. 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

  5. A square root is the opposite and UNDOES the squaring. This is easy if you know your times tables well. . .

  6. But if you don’t know the times tables . . . OR your number is REALLY odd?

  7. This also works with variables Comment here on negatives!

  8. Simplify

  9. Approximating and Estimating √18

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