EG3101 EG5116 EG4103 Matrices: adding and subtracting two 3x3 matrices

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Question 1

You will possibly need to adjust the number of rows and the number of columns your solution requires by entering the correct values for your solution; the template will then alter to hold your solution.

a)

What is $\simplify{{matrices[0]}+{matrices[1]}}$ ?

Rows: Columns:

Expected answer:

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b)

What is $\simplify{{matrices[0]}-{matrices[1]}}$ ?

Rows: Columns:

Expected answer:

Score: 0/1

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Advice

Remember : matrix multiplication requires each row of the first matrix A be multiplied by each column of the second matrix B:

If $A=\left( \begin{array}{ccc} a & b & c \\d & e & f\\g & h & j \end{array} \right),$

and $B=\left( \begin{array}{ccc} k & l & m \\n & p & q\\r & s & t\end{array} \right)$ ,

then $A+B=\left( \begin{array}{ccc} a+k & b+l & c+m\\d+n & e+p & f+q \\g+r & h+s & j+t \end{array} \right)$

$A-B=\left( \begin{array}{ccc} a-k & b-l & c-m\\d-n & e-p & f-q \\g-r & h-s & j-t \end{array} \right)$

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EG3101 EG5116 EG4103 Matrices: adding and subtracting two 3x3 matrices

a)

b)

Advice