GCSE Maths (Edexcel)

435 videos | 33 hours

Expanding Double Brackets with Surds

Please subscribe to watch this video.

This, and all other videos, are included in our premium subscriptions.

Premium accounts get access to all videos.

Number Structure and Calculation

Expanding Double Brackets with Surds

6:27 Surd Problems
Spec N8 A4
Previous Adding & Subtracting Surds Next Rationalising the Denominator
  • Double brackets can involve algebraic variables or surds
  • The FOIL method is used to expand double brackets
  • FOIL stands for First, Outer, Inner, Last
  • FOIL method ensures that both numbers in the first bracket are multiplied by both numbers in the second bracket
  • Expanded expressions can be simplified using laws for addition and subtraction
  • The square of a number can be written as two brackets multiplied together
  • The FOIL method can be used to expand squared expressions
  • When multiplying two negative numbers, the minus signs cancel out
  • Group like terms and simplify using the third subtraction rule
  • It is important to be comfortable with manipulating surds and using the different rules for simplification.

Please subscribe to access these revision notes.

This, and all other video notes, are included in our premium subscriptions.

Premium accounts get access to all videos and revision notes.