114. AQA A Level SLR16 DeMorgan’s law
About this video
AQA Specification Reference
AS Level 3.6.4.1
A Level 4.6.4.1
In this video we explain and discuss the importance of De Morgan's law, and how it can be use to manipulate and help simplify Boolean expressions.
Key question:
- What is De Morgan's law and how can it be used to help simplify Boolean expressions?
00:00 De Morgan's law
00:09 Intro
00:14 The need to simplify Boolean expressions
00:48 Simplifying Boolean algebra
01:17 Rules and laws of Boolean simplification
01:59 General rules of Boolean simplification: AND identities
02:51 General rules of Boolean simplification: OR identities
03:36 Understanding Boolean identities
04:53 Exam board rules and laws of Boolean simplification
04:59 De Morgan's law
08:17 Using De Morgan's law
10:42 Key question
10:53 Going beyond the specification
10:58 Additional rules and laws of Boolean simplification
11:13 Double negation
11:27 Association
12:05 Commutation
12:33 Distribution
13:27 Absorption
14:32 Outro
Last updated: 04.09.25
