Concept

Perfect Cube Numbers

A perfect cube is the result of multiplying an integer by itself three times (i.e., cubing it). Being able to recognize perfect cubes is an essential skill for factoring polynomials that involve the sum or difference of cubes. For example, the perfect cubes of the integers 11 through 1010 are:

  • 13=11^3 = 1
  • 23=82^3 = 8
  • 33=273^3 = 27
  • 43=644^3 = 64
  • 53=1255^3 = 125
  • 63=2166^3 = 216
  • 73=3437^3 = 343
  • 83=5128^3 = 512
  • 93=7299^3 = 729
  • 103=100010^3 = 1000

Committing these values to memory allows you to quickly recognize when a constant in a binomial is a perfect cube, which is the necessary first step before applying the sum or difference of cubes factoring formulas.

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Updated 2026-04-30

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