Linear Algebra Examples

$[\begin{array}{c} 6 \\ 4 \\ 6 \\ - 2 \end{array}] - \frac{1}{2} \cdot [\begin{array}{c} - 1 \\ 1 \\ 1 \\ 1 \end{array}]$

Step 1

Simplify each term.

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Step 1.1

Multiply $- \frac{1}{2}$ by each element of the matrix.

$[\begin{array}{c} 6 \\ 4 \\ 6 \\ - 2 \end{array}] + [\begin{array}{c} - \frac{1}{2} \cdot - 1 \\ - \frac{1}{2} \cdot 1 \\ - \frac{1}{2} \cdot 1 \\ - \frac{1}{2} \cdot 1 \end{array}]$

Step 1.2

Simplify each element in the matrix.

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Step 1.2.1

Multiply $- \frac{1}{2} \cdot - 1$ .

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Step 1.2.1.1

Multiply $- 1$ by $- 1$ .

$[\begin{array}{c} 6 \\ 4 \\ 6 \\ - 2 \end{array}] + [\begin{array}{c} 1 (\frac{1}{2}) \\ - \frac{1}{2} \cdot 1 \\ - \frac{1}{2} \cdot 1 \\ - \frac{1}{2} \cdot 1 \end{array}]$

Step 1.2.1.2

Multiply $\frac{1}{2}$ by $1$ .

$[\begin{array}{c} 6 \\ 4 \\ 6 \\ - 2 \end{array}] + [\begin{array}{c} \frac{1}{2} \\ - \frac{1}{2} \cdot 1 \\ - \frac{1}{2} \cdot 1 \\ - \frac{1}{2} \cdot 1 \end{array}]$

Step 1.2.2

Multiply $- 1$ by $1$ .

$[\begin{array}{c} 6 \\ 4 \\ 6 \\ - 2 \end{array}] + [\begin{array}{c} \frac{1}{2} \\ - \frac{1}{2} \\ - \frac{1}{2} \cdot 1 \\ - \frac{1}{2} \cdot 1 \end{array}]$

Step 1.2.3

Multiply $- 1$ by $1$ .

$[\begin{array}{c} 6 \\ 4 \\ 6 \\ - 2 \end{array}] + [\begin{array}{c} \frac{1}{2} \\ - \frac{1}{2} \\ - \frac{1}{2} \\ - \frac{1}{2} \cdot 1 \end{array}]$

Step 1.2.4

Multiply $- 1$ by $1$ .

$[\begin{array}{c} 6 \\ 4 \\ 6 \\ - 2 \end{array}] + [\begin{array}{c} \frac{1}{2} \\ - \frac{1}{2} \\ - \frac{1}{2} \\ - \frac{1}{2} \end{array}]$

Step 2

Add the corresponding elements.

$[\begin{array}{c} 6 + \frac{1}{2} \\ 4 - \frac{1}{2} \\ 6 - \frac{1}{2} \\ - 2 - \frac{1}{2} \end{array}]$

Step 3

Simplify each element.

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Step 3.1

To write $6$ as a fraction with a common denominator, multiply by $\frac{2}{2}$ .

$[\begin{array}{c} 6 \cdot \frac{2}{2} + \frac{1}{2} \\ 4 - \frac{1}{2} \\ 6 - \frac{1}{2} \\ - 2 - \frac{1}{2} \end{array}]$

Step 3.2

Combine $6$ and $\frac{2}{2}$ .

$[\begin{array}{c} \frac{6 \cdot 2}{2} + \frac{1}{2} \\ 4 - \frac{1}{2} \\ 6 - \frac{1}{2} \\ - 2 - \frac{1}{2} \end{array}]$

Step 3.3

Combine the numerators over the common denominator.

$[\begin{array}{c} \frac{6 \cdot 2 + 1}{2} \\ 4 - \frac{1}{2} \\ 6 - \frac{1}{2} \\ - 2 - \frac{1}{2} \end{array}]$

Step 3.4

Simplify the numerator.

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Step 3.4.1

Multiply $6$ by $2$ .

$[\begin{array}{c} \frac{12 + 1}{2} \\ 4 - \frac{1}{2} \\ 6 - \frac{1}{2} \\ - 2 - \frac{1}{2} \end{array}]$

Step 3.4.2

Add $12$ and $1$ .

$[\begin{array}{c} \frac{13}{2} \\ 4 - \frac{1}{2} \\ 6 - \frac{1}{2} \\ - 2 - \frac{1}{2} \end{array}]$

Step 3.5

To write $4$ as a fraction with a common denominator, multiply by $\frac{2}{2}$ .

$[\begin{array}{c} \frac{13}{2} \\ 4 \cdot \frac{2}{2} - \frac{1}{2} \\ 6 - \frac{1}{2} \\ - 2 - \frac{1}{2} \end{array}]$

Step 3.6

Combine $4$ and $\frac{2}{2}$ .

$[\begin{array}{c} \frac{13}{2} \\ \frac{4 \cdot 2}{2} - \frac{1}{2} \\ 6 - \frac{1}{2} \\ - 2 - \frac{1}{2} \end{array}]$

Step 3.7

Combine the numerators over the common denominator.

$[\begin{array}{c} \frac{13}{2} \\ \frac{4 \cdot 2 - 1}{2} \\ 6 - \frac{1}{2} \\ - 2 - \frac{1}{2} \end{array}]$

Step 3.8

Simplify the numerator.

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Step 3.8.1

Multiply $4$ by $2$ .

$[\begin{array}{c} \frac{13}{2} \\ \frac{8 - 1}{2} \\ 6 - \frac{1}{2} \\ - 2 - \frac{1}{2} \end{array}]$

Step 3.8.2

Subtract $1$ from $8$ .

$[\begin{array}{c} \frac{13}{2} \\ \frac{7}{2} \\ 6 - \frac{1}{2} \\ - 2 - \frac{1}{2} \end{array}]$

Step 3.9

To write $6$ as a fraction with a common denominator, multiply by $\frac{2}{2}$ .

$[\begin{array}{c} \frac{13}{2} \\ \frac{7}{2} \\ 6 \cdot \frac{2}{2} - \frac{1}{2} \\ - 2 - \frac{1}{2} \end{array}]$

Step 3.10

Combine $6$ and $\frac{2}{2}$ .

$[\begin{array}{c} \frac{13}{2} \\ \frac{7}{2} \\ \frac{6 \cdot 2}{2} - \frac{1}{2} \\ - 2 - \frac{1}{2} \end{array}]$

Step 3.11

Combine the numerators over the common denominator.

$[\begin{array}{c} \frac{13}{2} \\ \frac{7}{2} \\ \frac{6 \cdot 2 - 1}{2} \\ - 2 - \frac{1}{2} \end{array}]$

Step 3.12

Simplify the numerator.

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Step 3.12.1

Multiply $6$ by $2$ .

$[\begin{array}{c} \frac{13}{2} \\ \frac{7}{2} \\ \frac{12 - 1}{2} \\ - 2 - \frac{1}{2} \end{array}]$

Step 3.12.2

Subtract $1$ from $12$ .

$[\begin{array}{c} \frac{13}{2} \\ \frac{7}{2} \\ \frac{11}{2} \\ - 2 - \frac{1}{2} \end{array}]$

Step 3.13

To write $- 2$ as a fraction with a common denominator, multiply by $\frac{2}{2}$ .

$[\begin{array}{c} \frac{13}{2} \\ \frac{7}{2} \\ \frac{11}{2} \\ - 2 \cdot \frac{2}{2} - \frac{1}{2} \end{array}]$

Step 3.14

Combine $- 2$ and $\frac{2}{2}$ .

$[\begin{array}{c} \frac{13}{2} \\ \frac{7}{2} \\ \frac{11}{2} \\ \frac{- 2 \cdot 2}{2} - \frac{1}{2} \end{array}]$

Step 3.15

Combine the numerators over the common denominator.

$[\begin{array}{c} \frac{13}{2} \\ \frac{7}{2} \\ \frac{11}{2} \\ \frac{- 2 \cdot 2 - 1}{2} \end{array}]$

Step 3.16

Simplify the numerator.

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Step 3.16.1

Multiply $- 2$ by $2$ .

$[\begin{array}{c} \frac{13}{2} \\ \frac{7}{2} \\ \frac{11}{2} \\ \frac{- 4 - 1}{2} \end{array}]$

Step 3.16.2

Subtract $1$ from $- 4$ .

$[\begin{array}{c} \frac{13}{2} \\ \frac{7}{2} \\ \frac{11}{2} \\ \frac{- 5}{2} \end{array}]$

Step 3.17

Move the negative in front of the fraction.

$[\begin{array}{c} \frac{13}{2} \\ \frac{7}{2} \\ \frac{11}{2} \\ - \frac{5}{2} \end{array}]$