Factorisation Methods
- Common Factor: $2x + 4 = 2(x + 2)$
- Regrouping: $2xy + 3 + 2y + 3x = (2xy + 2y) + (3x + 3) = 2y(x + 1) + 3(x + 1) = (x + 1)(2y + 3)$
- Difference of Squares: $a^2 - b^2 = (a - b)(a + b)$
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