oh god, u r right.pemdas wrote:why you restrict the RHS to 9? The point is a multiplication of inequalities containing more than one inequality sign may not be admissible. We have to test each inequality.
-2<a<3
3<b<4
ab is not -8<ab<9 , but -8<ab<12 (12=3*4 , i.e. max value of the 1st inequity * max value of the 2nd inequity)
thnx for the correction
