Level 2 Certificate Mathematics · key term

Commutative

Definition

Describes an operation for which swapping the order leaves the result unchanged. Matrix multiplication is not commutative in general.

Used by AQA

Specification 5.1, 5.4 · Paper 1, Paper 2

Matrix multiplication is not commutative in general.
Revise: Matrix Multiplication
An operation is commutative if reversing the order leaves the result unchanged. Matrix multiplication is not commutative in general: $AB$ and $B$ can differ.

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B A