Because the denominator is a product of two different linear factors, split the fraction into two simpler fractions, one over each factor. Assume A/(x+2) + B/(x+4). Combining gives [A(x+4)+B(x+2)]/[(x+2)(x+4)]. Matching coefficients gives A=6, B=1. In practice, compare the coefficient of x and the constant term on both sides to find A and B. After A and B are found, place them above their matching denominators to get the partial fraction form.