## Elementary Algebra

$= \frac{(3+12x^{2})}{2x^{3}}$
1) Multiply a fraction with the other denominator to obtain a common denominator between the two fractions. In this case, we only need to multiply the second fraction by $2x^{2}/2x^{2}$ to obtain a common denominator of $2x^{3}$ 2) Add the fractions $= \frac{3}{2x^{3}} + \frac{6}{x}$ $= \frac{3}{2x^{3}} + \frac{6(2x^{2})}{2x^{3}}$ $= \frac{3+12x^{2}}{2x^{3}}$