1. The problem statement, all variables and given/known data 2. Relevant equations 3. The attempt at a solution After using this formula I got 1-3x + 6x2 for (1-x)-3 and 1+x - 1/8 ∙ 4x2 for (1+2x)1/2 for the second part of the question I'd assume that you're supposed to multiply the equations? I think this done by timing the whole of second bracket by first number (1) then second number (-3x) and then third number (6x2.from the second bracket.