Expanding double brackets (Edexcel GCSE Maths): Flashcards

Multiply every term in 1st bracket by every term in 2nd

One-at-a-time, FOIL, grid method

First, Outer, Inner, Last

Multiply first terms in each bracket

Multiply outer terms

Multiply inner terms

Multiply last terms in each bracket

Use table to organize multiplication of all terms

$(x+3)(x+3)$ - multiply bracket by itself

Always positive, e.g., $(-4)^2 = +16$

Terms with same letter and power

Collect like terms to simplify