Question

Factor completely and check mentally. 12a^2b^2-144ab

Answer 1

12 a² 2b² - 144 ab

Multiply te numbers :

12 * 2 = 24

therefore : 24a²b² - 144 ab

hope this helps!

Answer 2

Continuing from the person above, you can take out 24 from what you have, leaving you with 24(a^2 b^2 - 6ab).