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All positive real numbers have two square roots, a positive square root and a negative square root. A square root is written with the (radical symbol).

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Presentation on theme: "All positive real numbers have two square roots, a positive square root and a negative square root. A square root is written with the (radical symbol)."— Presentation transcript:

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2 All positive real numbers have two square roots, a positive square root and a negative square root. A square root is written with the (radical symbol). You need to approximate a square root if the radicand is a whole number that is not a perfect square.

3 The root of a whole number that is not a perfect square is an example of an irrational number. 945= The decimal form of an irrational number neither terminates or repeats.

4 In the example to the left, all are real numbers. Real Numbers Rational Numbers Integers Whole #s Irrational Numbers

5 Radicand- the number or expression inside a radical symbol Perfect Square- the square of an integer Square Root- Finding the square root of a number is the inverse operation of squaring that number. Remember, the square of a number is that number times itself. Real Number- the set of all rational and irrational numbers Irrational Number- a number that cannot be written as a quotient of two integers


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