5. Let $f(x)$ be a cubic polynomial. If $f(x)$ is divided by $2 x+3$, the remainder is 4 , while if it is divided by $3 x+4$, the remainder is 5 . What will be the remainder when $f(x)$ is divided by $6 x^{2}+17 x+12$ ?
5. $6 x+13$