Matrix Multiplication Rule
To multiply matrix A by matrix B (A × B): The number of columns in A MUST equal the number of rows in B.
If A is m × n and B is n × p, the result matrix C will have dimensions m × p.
Algebra 9 min read
How to Multiply Matrices: Step-by-Step Rule with Examples
Master matrix multiplication (dot product of rows and columns). Understand compatibility rules (columns of A must equal rows of B).
Published August 11, 2026
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Updated: August 11, 2026
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