Factorisation (Edexcel A-Level Mathematics): Flashcards

Reverse of expanding brackets; expressing as product of factors

Simplifies expressions and solves equations

$a(x + y)$

$3x(2x + 3)$

$ax^2 + bx + c$

Find two numbers: multiply to $c$, add to $b$

$(x + 2)(x + 3)$

Multiply $a imes c$

$(2x + 1)(x + 3)$

$a^2 - b^2 = (a + b)(a - b)$

$(x + 3)(x - 3)$

$a^2 + 2ab + b^2 = (a + b)^2$

$(x + 3)^2$

When expression has four terms