# How do find the derivative of F(x) = (x^2) (sin(3x))?

$\frac{d}{\mathrm{dx}} \left({x}^{2} \sin \left(3 x\right)\right) = 3 {x}^{2} \cos 3 x + 2 x \sin 3 x$
$\therefore \frac{d}{\mathrm{dx}} \left({x}^{2} \sin \left(3 x\right)\right) = 3 {x}^{2} \cos 3 x + 2 x \sin 3 x$
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