Multiple choice The product of ( x - 3)( x + a) equals x2 - x - 6 then the value of 'a' is -2 2 3 4 Reveal answer Fill a bubble to check yourself B Correct answer Explanation Expanding (x - 3)(x + a) = x^2 + ax - 3x - 3a = x^2 + (a - 3)x - 3a. Comparing to x^2 - x - 6, we have a - 3 = -1, so a = 2. Also -3a = -6, so a = 2.