Curriculum
Course: Mathematics — Second Preparatory
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Curriculum

Mathematics — Second Preparatory

Unit 1: Real Numbers

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Unit 2: Algebra

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Unit 3: Geometry

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Unit 4: Statistics

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Text lesson

Square and Cube Root Laws

Mathematics — Second Preparatory

Square and Cube Root Laws

The cube root

The cube root

  • The cube root of a number a is the number which, when cubed, gives a.
  • It is written 3√a.
  • Unlike the square root, the cube root is defined for negative numbers too, because the cube of a negative number is negative:
  1. 3√(a³) = a. For example, 3√8 = 2, because 23 = 8.
  2. 3√(−8) = −2, because (−2)3 = −8.
  3. 3√(8 ÷ 27) = 2 ÷ 3, because (2 ÷ 3)3 = 8 ÷ 27.
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