# What is the derivative of f(x)=(x-1)(x-2)(x-3)?

$\frac{\mathrm{df} \left(x\right)}{\mathrm{dx}} = 3 {x}^{2} - 12 x + 12$
$f \left(x\right) = \left(x - 1\right) \left(x - 2\right) \left(x - 3\right)$
$= {x}^{3} - 6 {x}^{2} + 12 x - 6$