Taking a number to the 3rd power (x3) is called finding the cube of that number. Fill in the table of perfect cubes. x 1 2 3 4 5 6 7 8 9 10 x3 The of a number is one of the of the number. cube root three identical factors {Identical Triplets!} Positive numbers have positive cube Negative numbers have negative cube roots. Practice. When simplifying radical expressions, we look for identical twins (square roots) and identical triplets (cube roots). After identifying all identical items, any remain under the “left-overs” radical. Examples.
Taking a number to the 3rd power (x3) is called finding the cube of that number. Fill in the table of perfect cubes. x 1 2 3 4 5 6 7 8 9 10 x3 The cube root of a number is one of the three identical factors of the number. {Identical Triplets!} Positive numbers have positive cube Negative numbers have negative cube roots. Practice. When simplifying radical expressions, we look for identical twins (square roots) and identical triplets (cube roots). After identifying all identical items, any “left-overs” remain under the radical. Examples.
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