inequalities

[confused]

quite a tedious question, but orginally I thought reversing the inequality was from "dividing or multiplying a negative number."

Q. (x-1)(x-2) > 0
my answer.
x>2 or x>1

however the answers are different.
x<1 or x>2

many thanks!

[StuartS]

You have made a very common mistake.

Look at my tutorial
http://www.examsolutions.co.uk/maths-tutorials/quadratic-inequality/video.php

Hope it helps