1. The problem statement, all variables and given/known data Calc I problem, so need to solve by calc 1 methods. ∫ (x-1)(x+1)^11 dx 2. Relevant equations 3. The attempt at a solution ∫ (x-1)(x+1)^11 dx U = x+1 dU = dx x-1 = x+1-2 = U-2 =∫ (U-2)U^11 dU =∫ U^12 dU - 2∫ U^11 dU =(1/13)U^13 - (1/6)U^12 =(1/13)(x+1)^13 - (1/6)(X+1)^12 ∫ (x-1)(x+1)^11 dx = (1/13)(x+1)^13 - (1/6)(X+1)^12 The course ended already, this was the final test problem (on the test that ended already). I didn't understand how to do this one. I can check my answer and see it's wrong. My teacher won't be in until fall semester starts, so I can't ask him until then. I was already at full time, so Calc I was basically a free class I retook because it could boost GPA without being time consuming.