Factorisation

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What is the factor form of $a^2 - b^2$?

$(a - b)(a + b)$ (Difference of squares identity)

What is the factorisation of $x^3 - 3x^2$?

$x^2(x - 3)$ (Factor out the common factor)

What is a common factor?

A common factor is a number or expression that divides two or more terms without leaving a remainder.

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