# Integrals of Partial Fractions

#### romsek

MHF Helper
they multiplied top and bottom by 3

Okay, but why?

#### romsek

MHF Helper
to make the numerator match the coefficient of $x$ in the denominator so that the form matched the integral template of a $\ln$ function

#### Plato

MHF Helper
Okay, but why?
Do this derivative: ${D_x}\left( {\frac{1}{{12}}\log (2 + 3x)} \right)$