Square Roots and Cube Roots

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Presentation transcript:

Square Roots and Cube Roots 4.6

Perfect Squares 1 36 121 4 49 144 9 64 169 16 81 196 25 100 225

Square Root A square root of a number is one of its two equal factors. Notation: radical sign is used to indicate a nonnegative square root.

Positive and Negative Signs

Find each square root

Estimate to the Nearest Integer For numbers that are not perfect squares, find the two perfect square the number is between. Graph the square root on the number line to determine which perfect square it is closest to.

Estimate the nearest Integer

Cube Roots A cube root of a number is one of its three equal factors If then

Perfect Cube Roots 1 125 729 8 216 1000 27 343 64 512

Every Integer has exactly one cube root The cube root of a positive number is positive The cube root of zero is zero The cube root of a negative number is negative

Find the Cube Root

Estimate to the nearest integer

Homework Page 172 (16-38) even