I have a question on what I did wrong
The first problem:
1. was to solve the inequality x^2+6x-27<0. The solution is x is in the open interval (A, B) where A is:___ and B is:___
for that i did (x-9)(x+3) so i thought the answer for A would have been 9 or (9,infinity) but it says it was wrong, and for be either -3 or (-infinity,-3)
2. was to write the answer in interval notation for (x-5)(x-11)>0 I got (5,infinity)U(11,infinity) webwork said it is incorrect too, so can anyone help me out what mistake i made for those two problems?