MATRIX (MULTIPILCATION BETWEEN 2 MATRICES)

By sarhnbls | Updated: Jan. 3, 2024, 3:51 a.m.

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We are explaining and teaching on how to solve the question using matrices. CREDIT TO : SARAH NURNABILA BINTI SHUHAIMI (301316) NUR AIN SALWANI BINTI MUSTAPE (300185)

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Multiplication between 2 matrices 
MATRIX
LET'S START !!!
What is Multiplication of Matrices ?
Multiplication of Matrices is :

The product of two matrices A and B is defined only when the number of columns in A is equal to the number of rows in B.

If the order of A is m x n and the order of B is n x p then AB has order m x p
What is Multiplication of Matrices ?
For example :

QUESTION 1
Let A =              and B =

Calculate 3A-2B.
HOW TO SOLVE THIS QUESTION ?
Insert A and B in 3A-2B.
2. Then, multiply it as usual. 
3. Lastly, you will get the answer.
LET'S TRY TO SOLVE THE QUESTION !!!
QUESTION 1
SOLUTION :
Insert A and B in 3A-2B.
2. Then, multiply and substract it as usual. 
3. Lastly, you will get the answer.
EASY, RIGHT ? SO LET'S TAKE A LOOK AT ANOTHER QUESTION 
QUESTION 2
Find
Firstly, check the order or the matrix. First matrix is 2x3 and the second matrix is 3x2.
2x3 
3x2
same 
So, the answer will be in 2x2.
QUESTION 2
SOLUTION :
R1 multiply with C1 from the second matrix. Then, R1 multiply C2.
R2 multiply with C1 from the second matrix. Then, R2 multiply C2.
R1
R2
C1
C2
QUESTION 2
SOLUTION :
Lastly, you will get the answer in 2x2.
R1
R2
C1
C2
QUESTION 3
QUESTION 3
SOLUTION :
Multiply R1 with C1 from the second matrix. Then, multiply R1 with C2.
Multiply R2 with C1 from the second matrix. Then, Multiply R2 with C2.
QUESTION 3
SOLUTION :
This is the solution for AB
QUESTION 3
SOLUTION :
Repeat the same step from AB to find BA
Since the answer for AB and BA is not the same, it is shown 
Shown
Credit to :
301316 SARAH NURNABILA BINTI SHUHAIMI 
300185 NUR AIN SALWANI BINTI MUSTAPE 
DO NOT 
GIVEUP !

MATRIX (MULTIPILCATION BETWEEN 2 MATRICES)

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