15. Which expression is equivalent to the expression below ?' x2 + 6x + 15 X+ 3 A. X + 3 B. X+1 + 5 X+3 C. X+3+ 6 X+ 3 D. X- 3 + 3 X+ 3 16. The graph of F (x) represents an even function. The graph of F(X ) crosses the x-axis in three places ; ( - 5, 0 ) , ( - 2, 0 ) , and ( 2 , 0 ) choose the factored Form of an equation that best represents the polynomial. A. F ( X ) = a (x + 5 ) ( x 2 - 4 ) B . F ( X ) = a ( x 2 + 10* + 25 ) ( * 2 - 4 ) C. F ( x ) = a (x 2+ 7 x+10 ) ( x 2_4 ) D. F ( x ) = a ( x 2+ 3x- 10 ) (x+2 )