GCSE Maths (Edexcel)

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Roots

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Number Structure and Calculation

Roots

5:34 Indicies & Roots
Spec N6 N7
Previous Key Indices Next Index Division Rule
  • Roots are the inverse of powers
  • The square root of a number is a value that, when multiplied by itself once, gives the original number
  • The square root is shown by the square root symbol
  • Square rooting is the inverse operation to squaring
  • Taking the square root of a perfect square gives a whole number
  • Taking the square root of a non-perfect square gives a decimal
  • The cube root of a number is a value that, when multiplied together three times, gives the original number
  • The cube root is shown by the cube root symbol
  • Cube rooting can be done for negative numbers
  • Taking the cube root of a perfect cube gives a whole number
  • Taking the cube root of a non-perfect cube gives a decimal
  • Larger roots, such as the 4th and 5th root, can also be calculated
  • The name of a root is given by the number used in the root symbol

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