Linear Algebra Examples

$[\begin{array}{c} 1 & 0 & 0 & 0 \\ 0 & 1 & 0 & 0 \\ 0 & 0 & 1 & 0 \\ 0 & 0 & 0 & 1 \end{array}] - [\begin{array}{c} - 1 & 2 & 0 & 1 \\ 1 & 2 & 1 & 1 \\ 0 & 1 & 1 & - 1 \\ 0 & 0 & 1 & 2 \end{array}]$

Step 1

Subtract the corresponding elements.

$[\begin{array}{c} 1 + 1 & 0 - 2 & 0 - 0 & 0 - 1 \\ 0 - 1 & 1 - 2 & 0 - 1 & 0 - 1 \\ 0 - 0 & 0 - 1 & 1 - 1 & 0 + 1 \\ 0 - 0 & 0 - 0 & 0 - 1 & 1 - 2 \end{array}]$

Step 2

Simplify each element.

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Step 2.1

Add $1$ and $1$ .

$[\begin{array}{c} 2 & 0 - 2 & 0 - 0 & 0 - 1 \\ 0 - 1 & 1 - 2 & 0 - 1 & 0 - 1 \\ 0 - 0 & 0 - 1 & 1 - 1 & 0 + 1 \\ 0 - 0 & 0 - 0 & 0 - 1 & 1 - 2 \end{array}]$

Step 2.2

Subtract $2$ from $0$ .

$[\begin{array}{c} 2 & - 2 & 0 - 0 & 0 - 1 \\ 0 - 1 & 1 - 2 & 0 - 1 & 0 - 1 \\ 0 - 0 & 0 - 1 & 1 - 1 & 0 + 1 \\ 0 - 0 & 0 - 0 & 0 - 1 & 1 - 2 \end{array}]$

Step 2.3

Subtract $0$ from $0$ .

$[\begin{array}{c} 2 & - 2 & 0 & 0 - 1 \\ 0 - 1 & 1 - 2 & 0 - 1 & 0 - 1 \\ 0 - 0 & 0 - 1 & 1 - 1 & 0 + 1 \\ 0 - 0 & 0 - 0 & 0 - 1 & 1 - 2 \end{array}]$

Step 2.4

Subtract $1$ from $0$ .

$[\begin{array}{c} 2 & - 2 & 0 & - 1 \\ 0 - 1 & 1 - 2 & 0 - 1 & 0 - 1 \\ 0 - 0 & 0 - 1 & 1 - 1 & 0 + 1 \\ 0 - 0 & 0 - 0 & 0 - 1 & 1 - 2 \end{array}]$

Step 2.5

Subtract $1$ from $0$ .

$[\begin{array}{c} 2 & - 2 & 0 & - 1 \\ - 1 & 1 - 2 & 0 - 1 & 0 - 1 \\ 0 - 0 & 0 - 1 & 1 - 1 & 0 + 1 \\ 0 - 0 & 0 - 0 & 0 - 1 & 1 - 2 \end{array}]$

Step 2.6

Subtract $2$ from $1$ .

$[\begin{array}{c} 2 & - 2 & 0 & - 1 \\ - 1 & - 1 & 0 - 1 & 0 - 1 \\ 0 - 0 & 0 - 1 & 1 - 1 & 0 + 1 \\ 0 - 0 & 0 - 0 & 0 - 1 & 1 - 2 \end{array}]$

Step 2.7

Subtract $1$ from $0$ .

$[\begin{array}{c} 2 & - 2 & 0 & - 1 \\ - 1 & - 1 & - 1 & 0 - 1 \\ 0 - 0 & 0 - 1 & 1 - 1 & 0 + 1 \\ 0 - 0 & 0 - 0 & 0 - 1 & 1 - 2 \end{array}]$

Step 2.8

Subtract $1$ from $0$ .

$[\begin{array}{c} 2 & - 2 & 0 & - 1 \\ - 1 & - 1 & - 1 & - 1 \\ 0 - 0 & 0 - 1 & 1 - 1 & 0 + 1 \\ 0 - 0 & 0 - 0 & 0 - 1 & 1 - 2 \end{array}]$

Step 2.9

Subtract $0$ from $0$ .

$[\begin{array}{c} 2 & - 2 & 0 & - 1 \\ - 1 & - 1 & - 1 & - 1 \\ 0 & 0 - 1 & 1 - 1 & 0 + 1 \\ 0 - 0 & 0 - 0 & 0 - 1 & 1 - 2 \end{array}]$

Step 2.10

Subtract $1$ from $0$ .

$[\begin{array}{c} 2 & - 2 & 0 & - 1 \\ - 1 & - 1 & - 1 & - 1 \\ 0 & - 1 & 1 - 1 & 0 + 1 \\ 0 - 0 & 0 - 0 & 0 - 1 & 1 - 2 \end{array}]$

Step 2.11

Subtract $1$ from $1$ .

$[\begin{array}{c} 2 & - 2 & 0 & - 1 \\ - 1 & - 1 & - 1 & - 1 \\ 0 & - 1 & 0 & 0 + 1 \\ 0 - 0 & 0 - 0 & 0 - 1 & 1 - 2 \end{array}]$

Step 2.12

Add $0$ and $1$ .

$[\begin{array}{c} 2 & - 2 & 0 & - 1 \\ - 1 & - 1 & - 1 & - 1 \\ 0 & - 1 & 0 & 1 \\ 0 - 0 & 0 - 0 & 0 - 1 & 1 - 2 \end{array}]$

Step 2.13

Subtract $0$ from $0$ .

$[\begin{array}{c} 2 & - 2 & 0 & - 1 \\ - 1 & - 1 & - 1 & - 1 \\ 0 & - 1 & 0 & 1 \\ 0 & 0 - 0 & 0 - 1 & 1 - 2 \end{array}]$

Step 2.14

Subtract $0$ from $0$ .

$[\begin{array}{c} 2 & - 2 & 0 & - 1 \\ - 1 & - 1 & - 1 & - 1 \\ 0 & - 1 & 0 & 1 \\ 0 & 0 & 0 - 1 & 1 - 2 \end{array}]$

Step 2.15

Subtract $1$ from $0$ .

$[\begin{array}{c} 2 & - 2 & 0 & - 1 \\ - 1 & - 1 & - 1 & - 1 \\ 0 & - 1 & 0 & 1 \\ 0 & 0 & - 1 & 1 - 2 \end{array}]$

Step 2.16

Subtract $2$ from $1$ .

$[\begin{array}{c} 2 & - 2 & 0 & - 1 \\ - 1 & - 1 & - 1 & - 1 \\ 0 & - 1 & 0 & 1 \\ 0 & 0 & - 1 & - 1 \end{array}]$