Paper 1 · Algebra Lesson 9 of 22

LCOL Algebra 9: Factorising 2

⬇ Download worked PDF

In this lesson you’ll learn to

  • Factorise a difference of two squares
  • Take out a common factor first when there is one

Formula used

Difference of two squares

a² − b² = (a − b)(a + b)

On page 20 of the log tables — read it off, don’t memorise.
Open the worked PDF

💬 Stuck on something in this lesson?

Send your question with this lesson’s name attached — you’ll get a reply by email.