Linear Algebra Examples

$A = [\begin{array}{c} - 8 & - 1 & - 3 \\ 7 & 7 & - 9 \\ 2 & 6 & 1 \end{array}] + [\begin{array}{c} - 2 & - 7 & 4 \\ 2 & - 4 & - 8 \\ 4 & 6 & 4 \end{array}]$

Step 1

Add the corresponding elements.

$A = [\begin{array}{c} - 8 - 2 & - 1 - 7 & - 3 + 4 \\ 7 + 2 & 7 - 4 & - 9 - 8 \\ 2 + 4 & 6 + 6 & 1 + 4 \end{array}]$

Step 2

Simplify each element.

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Step 2.1

Subtract $2$ from $- 8$ .

$A = [\begin{array}{c} - 10 & - 1 - 7 & - 3 + 4 \\ 7 + 2 & 7 - 4 & - 9 - 8 \\ 2 + 4 & 6 + 6 & 1 + 4 \end{array}]$

Step 2.2

Subtract $7$ from $- 1$ .

$A = [\begin{array}{c} - 10 & - 8 & - 3 + 4 \\ 7 + 2 & 7 - 4 & - 9 - 8 \\ 2 + 4 & 6 + 6 & 1 + 4 \end{array}]$

Step 2.3

Add $- 3$ and $4$ .

$A = [\begin{array}{c} - 10 & - 8 & 1 \\ 7 + 2 & 7 - 4 & - 9 - 8 \\ 2 + 4 & 6 + 6 & 1 + 4 \end{array}]$

Step 2.4

Add $7$ and $2$ .

$A = [\begin{array}{c} - 10 & - 8 & 1 \\ 9 & 7 - 4 & - 9 - 8 \\ 2 + 4 & 6 + 6 & 1 + 4 \end{array}]$

Step 2.5

Subtract $4$ from $7$ .

$A = [\begin{array}{c} - 10 & - 8 & 1 \\ 9 & 3 & - 9 - 8 \\ 2 + 4 & 6 + 6 & 1 + 4 \end{array}]$

Step 2.6

Subtract $8$ from $- 9$ .

$A = [\begin{array}{c} - 10 & - 8 & 1 \\ 9 & 3 & - 17 \\ 2 + 4 & 6 + 6 & 1 + 4 \end{array}]$

Step 2.7

Add $2$ and $4$ .

$A = [\begin{array}{c} - 10 & - 8 & 1 \\ 9 & 3 & - 17 \\ 6 & 6 + 6 & 1 + 4 \end{array}]$

Step 2.8

Add $6$ and $6$ .

$A = [\begin{array}{c} - 10 & - 8 & 1 \\ 9 & 3 & - 17 \\ 6 & 12 & 1 + 4 \end{array}]$

Step 2.9

Add $1$ and $4$ .

$A = [\begin{array}{c} - 10 & - 8 & 1 \\ 9 & 3 & - 17 \\ 6 & 12 & 5 \end{array}]$