gingermarief220 gingermarief220 22-09-2020 Mathematics contestada Simplify the expression given below. X + 2 / x^3 + 2x^2 - 9x - 18 ÷ 3x + 1 / x^2 - 9 А. 1 / 3x +1 B. 1 / (x + 3)(x - 3) C. 3x + 1 / (x + 3)(x - 3) D. 3x + 1