Answer :
what we have to do here is distribute the -2 through the parenthesis....all that means is multiply -2 by everything in the parenthesis,
-2(b + 6) = (-2 * b) + (-2 * 6) = -2b +(-12) = -2b - 12
-2(b + 6) = (-2 * b) + (-2 * 6) = -2b +(-12) = -2b - 12