Positive and Negative

In Mathematics;

Positive x Positive = Positive
Negative x Negative = Positive
Positive x Negative = Negative

In Electrical;

Positive + Positive = No current flow
Negative + Negative = No current flow
Positive + Negative = Current flow

In Thoughts;

Positive & Positive = Positive
Negative & Negative = Negative
Positive & Negative = Neutral

p/s: How different the things/results can be, although the terms used is same...