The Product of Two Negative Numbers

Level 1 (Grade 8)

Ever wondered why a negative times a negative is positive? Schools always teach this fact but never revealed why it is true. Once you have learned the truth, impress your friends and teachers with all the neat algebraic tricks behind this conundrum.

Here's the Link:

http://math-physics-problems.wikia.com/wiki/Product_of_Two_Negative_Numbers

#Algebra #Proofs #Arithmetic #StuffTheyDoNotTeachInSchool #Math