Linear Algebra Examples

$2 \cdot [\begin{array}{c} 4 & - 3 \\ 0 & 2 \\ - 1 & 5 \\ 3 & 0 \end{array}] - 3 \cdot [\begin{array}{c} 1 & - 7 & 0 \\ 3 & 4 & - 6 \end{array}]$

Step 1

Multiply $2$ by each element of the matrix.

$[\begin{array}{c} 2 \cdot 4 & 2 \cdot - 3 \\ 2 \cdot 0 & 2 \cdot 2 \\ 2 \cdot - 1 & 2 \cdot 5 \\ 2 \cdot 3 & 2 \cdot 0 \end{array}] - 3 \cdot [\begin{array}{c} 1 & - 7 & 0 \\ 3 & 4 & - 6 \end{array}]$

Step 2

Simplify each element in the matrix.

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Step 2.1

Multiply $2$ by $4$ .

$[\begin{array}{c} 8 & 2 \cdot - 3 \\ 2 \cdot 0 & 2 \cdot 2 \\ 2 \cdot - 1 & 2 \cdot 5 \\ 2 \cdot 3 & 2 \cdot 0 \end{array}] - 3 \cdot [\begin{array}{c} 1 & - 7 & 0 \\ 3 & 4 & - 6 \end{array}]$

Step 2.2

Multiply $2$ by $- 3$ .

$[\begin{array}{c} 8 & - 6 \\ 2 \cdot 0 & 2 \cdot 2 \\ 2 \cdot - 1 & 2 \cdot 5 \\ 2 \cdot 3 & 2 \cdot 0 \end{array}] - 3 \cdot [\begin{array}{c} 1 & - 7 & 0 \\ 3 & 4 & - 6 \end{array}]$

Step 2.3

Multiply $2$ by $0$ .

$[\begin{array}{c} 8 & - 6 \\ 0 & 2 \cdot 2 \\ 2 \cdot - 1 & 2 \cdot 5 \\ 2 \cdot 3 & 2 \cdot 0 \end{array}] - 3 \cdot [\begin{array}{c} 1 & - 7 & 0 \\ 3 & 4 & - 6 \end{array}]$

Step 2.4

Multiply $2$ by $2$ .

$[\begin{array}{c} 8 & - 6 \\ 0 & 4 \\ 2 \cdot - 1 & 2 \cdot 5 \\ 2 \cdot 3 & 2 \cdot 0 \end{array}] - 3 \cdot [\begin{array}{c} 1 & - 7 & 0 \\ 3 & 4 & - 6 \end{array}]$

Step 2.5

Multiply $2$ by $- 1$ .

$[\begin{array}{c} 8 & - 6 \\ 0 & 4 \\ - 2 & 2 \cdot 5 \\ 2 \cdot 3 & 2 \cdot 0 \end{array}] - 3 \cdot [\begin{array}{c} 1 & - 7 & 0 \\ 3 & 4 & - 6 \end{array}]$

Step 2.6

Multiply $2$ by $5$ .

$[\begin{array}{c} 8 & - 6 \\ 0 & 4 \\ - 2 & 10 \\ 2 \cdot 3 & 2 \cdot 0 \end{array}] - 3 \cdot [\begin{array}{c} 1 & - 7 & 0 \\ 3 & 4 & - 6 \end{array}]$

Step 2.7

Multiply $2$ by $3$ .

$[\begin{array}{c} 8 & - 6 \\ 0 & 4 \\ - 2 & 10 \\ 6 & 2 \cdot 0 \end{array}] - 3 \cdot [\begin{array}{c} 1 & - 7 & 0 \\ 3 & 4 & - 6 \end{array}]$

Step 2.8

Multiply $2$ by $0$ .

$[\begin{array}{c} 8 & - 6 \\ 0 & 4 \\ - 2 & 10 \\ 6 & 0 \end{array}] - 3 \cdot [\begin{array}{c} 1 & - 7 & 0 \\ 3 & 4 & - 6 \end{array}]$

Step 3

Multiply $- 3$ by each element of the matrix.

$[\begin{array}{c} 8 & - 6 \\ 0 & 4 \\ - 2 & 10 \\ 6 & 0 \end{array}] + [\begin{array}{c} - 3 \cdot 1 & - 3 \cdot - 7 & - 3 \cdot 0 \\ - 3 \cdot 3 & - 3 \cdot 4 & - 3 \cdot - 6 \end{array}]$

Step 4

Simplify each element in the matrix.

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Step 4.1

Multiply $- 3$ by $1$ .

$[\begin{array}{c} 8 & - 6 \\ 0 & 4 \\ - 2 & 10 \\ 6 & 0 \end{array}] + [\begin{array}{c} - 3 & - 3 \cdot - 7 & - 3 \cdot 0 \\ - 3 \cdot 3 & - 3 \cdot 4 & - 3 \cdot - 6 \end{array}]$

Step 4.2

Multiply $- 3$ by $- 7$ .

$[\begin{array}{c} 8 & - 6 \\ 0 & 4 \\ - 2 & 10 \\ 6 & 0 \end{array}] + [\begin{array}{c} - 3 & 21 & - 3 \cdot 0 \\ - 3 \cdot 3 & - 3 \cdot 4 & - 3 \cdot - 6 \end{array}]$

Step 4.3

Multiply $- 3$ by $0$ .

$[\begin{array}{c} 8 & - 6 \\ 0 & 4 \\ - 2 & 10 \\ 6 & 0 \end{array}] + [\begin{array}{c} - 3 & 21 & 0 \\ - 3 \cdot 3 & - 3 \cdot 4 & - 3 \cdot - 6 \end{array}]$

Step 4.4

Multiply $- 3$ by $3$ .

$[\begin{array}{c} 8 & - 6 \\ 0 & 4 \\ - 2 & 10 \\ 6 & 0 \end{array}] + [\begin{array}{c} - 3 & 21 & 0 \\ - 9 & - 3 \cdot 4 & - 3 \cdot - 6 \end{array}]$

Step 4.5

Multiply $- 3$ by $4$ .

$[\begin{array}{c} 8 & - 6 \\ 0 & 4 \\ - 2 & 10 \\ 6 & 0 \end{array}] + [\begin{array}{c} - 3 & 21 & 0 \\ - 9 & - 12 & - 3 \cdot - 6 \end{array}]$

Step 4.6

Multiply $- 3$ by $- 6$ .

$[\begin{array}{c} 8 & - 6 \\ 0 & 4 \\ - 2 & 10 \\ 6 & 0 \end{array}] + [\begin{array}{c} - 3 & 21 & 0 \\ - 9 & - 12 & 18 \end{array}]$