Algebra › Section H · Roots and radicals › Topic H.4

Adding, subtracting, and multiplying radicals

Radicals behave like old friends from earlier algebra: they combine the way like terms do and multiply the way monomials do — once each radical is in its simplest clothes.

In this topic

  • Radicals rejoin the algebra family
  • Like radicals combine
  • Simplify first, then combine
  • Worked example: subtracting disguised radicals
  • The product rule for radicals
  • Multiplying out with distributivity
  • Worked example: FOIL with radicals
  • Conjugates and squaring patterns
  • Different indices do not multiply directly
  • Common mistakes to avoid
  • Key takeaways

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