12'2 Using Square roots

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12.2 Using Square roots
This symbol is called the Radical Symbol.
You use the Radical Symbol to take the Square
Root of a number.
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This can be read as Radical 16.
To take the Square Root what number times itself
will give you 16.
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This can be read as ___________.
Radical 25
To take the Square Root what number times itself
will give you 25.
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The numbers listed below are called Perfect
Squares, because the square root of that number
is an integer.
1, 4, 9, 16, 25, 36, 49, 64, 81, 100, 121, etc
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Now, we have to take the square root of numbers
that are NOT perfect squares.
We are going to write our answers using EXACT
VALUES, which means no decimals are allowed in
your answer.
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EXACT VALUES
1. Find the Biggest Perfect Square which is a
factor of a number under the radical.
2. Rewrite the problem.
3. Simplify the problem.
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EXACT VALUES
1.
4
2.
3.
9
EXACT VALUES
1.
9
2.
3.
10
EXACT VALUES
1.
36
2.
3.
11
EXACT VALUES
1.
25
2.
3.
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Homework

• Worksheet 12.2