1. The problem statement, all variables and given/known data When 3x5 - ax + b is divided by x - 1 and x + 1 the remainders are equal. Given that a, b ε ℝ (a) the value of a; (b) the set of values of b. 2. Relevant equations 3. The attempt at a solution f(1) = f(-1) 3 - a + b = -3 + a + b 6 = 2a a = 3 ...  Substitute a -3 into 3 - a + b b = 0 Can someone please explain to me why the set of values of b would be all real numbers? From my knowledge, I believe my way of understanding is unclear and may be incorrect. My interpretation: b not being affected by any coefficients and that b is simply a constant in a function. Cheers.