Linear Algebra Examples

$a [\begin{array}{c} - 2 \\ - 4 \\ 1 \\ 1 \end{array}] + b [\begin{array}{c} 3 \\ - 4 \\ 0 \\ 4 \end{array}] + d [\begin{array}{c} - 1 \\ - 12 \\ 2 \\ 6 \end{array}]$

Step 1

Simplify each term.

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Step 1.1

Multiply $a$ by each element of the matrix.

$[\begin{array}{c} a \cdot - 2 \\ a \cdot - 4 \\ a \cdot 1 \\ a \cdot 1 \end{array}] + b [\begin{array}{c} 3 \\ - 4 \\ 0 \\ 4 \end{array}] + d [\begin{array}{c} - 1 \\ - 12 \\ 2 \\ 6 \end{array}]$

Step 1.2

Simplify each element in the matrix.

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Step 1.2.1

Move $- 2$ to the left of $a$ .

$[\begin{array}{c} - 2 a \\ a \cdot - 4 \\ a \cdot 1 \\ a \cdot 1 \end{array}] + b [\begin{array}{c} 3 \\ - 4 \\ 0 \\ 4 \end{array}] + d [\begin{array}{c} - 1 \\ - 12 \\ 2 \\ 6 \end{array}]$

Step 1.2.2

Move $- 4$ to the left of $a$ .

$[\begin{array}{c} - 2 a \\ - 4 a \\ a \cdot 1 \\ a \cdot 1 \end{array}] + b [\begin{array}{c} 3 \\ - 4 \\ 0 \\ 4 \end{array}] + d [\begin{array}{c} - 1 \\ - 12 \\ 2 \\ 6 \end{array}]$

Step 1.2.3

Multiply $a$ by $1$ .

$[\begin{array}{c} - 2 a \\ - 4 a \\ a \\ a \cdot 1 \end{array}] + b [\begin{array}{c} 3 \\ - 4 \\ 0 \\ 4 \end{array}] + d [\begin{array}{c} - 1 \\ - 12 \\ 2 \\ 6 \end{array}]$

Step 1.2.4

Multiply $a$ by $1$ .

$[\begin{array}{c} - 2 a \\ - 4 a \\ a \\ a \end{array}] + b [\begin{array}{c} 3 \\ - 4 \\ 0 \\ 4 \end{array}] + d [\begin{array}{c} - 1 \\ - 12 \\ 2 \\ 6 \end{array}]$

Step 1.3

Multiply $b$ by each element of the matrix.

$[\begin{array}{c} - 2 a \\ - 4 a \\ a \\ a \end{array}] + [\begin{array}{c} b \cdot 3 \\ b \cdot - 4 \\ b \cdot 0 \\ b \cdot 4 \end{array}] + d [\begin{array}{c} - 1 \\ - 12 \\ 2 \\ 6 \end{array}]$

Step 1.4

Simplify each element in the matrix.

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Step 1.4.1

Move $3$ to the left of $b$ .

$[\begin{array}{c} - 2 a \\ - 4 a \\ a \\ a \end{array}] + [\begin{array}{c} 3 b \\ b \cdot - 4 \\ b \cdot 0 \\ b \cdot 4 \end{array}] + d [\begin{array}{c} - 1 \\ - 12 \\ 2 \\ 6 \end{array}]$

Step 1.4.2

Move $- 4$ to the left of $b$ .

$[\begin{array}{c} - 2 a \\ - 4 a \\ a \\ a \end{array}] + [\begin{array}{c} 3 b \\ - 4 b \\ b \cdot 0 \\ b \cdot 4 \end{array}] + d [\begin{array}{c} - 1 \\ - 12 \\ 2 \\ 6 \end{array}]$

Step 1.4.3

Multiply $b$ by $0$ .

$[\begin{array}{c} - 2 a \\ - 4 a \\ a \\ a \end{array}] + [\begin{array}{c} 3 b \\ - 4 b \\ 0 \\ b \cdot 4 \end{array}] + d [\begin{array}{c} - 1 \\ - 12 \\ 2 \\ 6 \end{array}]$

Step 1.4.4

Move $4$ to the left of $b$ .

$[\begin{array}{c} - 2 a \\ - 4 a \\ a \\ a \end{array}] + [\begin{array}{c} 3 b \\ - 4 b \\ 0 \\ 4 b \end{array}] + d [\begin{array}{c} - 1 \\ - 12 \\ 2 \\ 6 \end{array}]$

Step 1.5

Multiply $d$ by each element of the matrix.

$[\begin{array}{c} - 2 a \\ - 4 a \\ a \\ a \end{array}] + [\begin{array}{c} 3 b \\ - 4 b \\ 0 \\ 4 b \end{array}] + [\begin{array}{c} d \cdot - 1 \\ d \cdot - 12 \\ d \cdot 2 \\ d \cdot 6 \end{array}]$

Step 1.6

Simplify each element in the matrix.

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Step 1.6.1

Move $- 1$ to the left of $d$ .

$[\begin{array}{c} - 2 a \\ - 4 a \\ a \\ a \end{array}] + [\begin{array}{c} 3 b \\ - 4 b \\ 0 \\ 4 b \end{array}] + [\begin{array}{c} - 1 \cdot d \\ d \cdot - 12 \\ d \cdot 2 \\ d \cdot 6 \end{array}]$

Step 1.6.2

Rewrite $- 1 d$ as $- d$ .

$[\begin{array}{c} - 2 a \\ - 4 a \\ a \\ a \end{array}] + [\begin{array}{c} 3 b \\ - 4 b \\ 0 \\ 4 b \end{array}] + [\begin{array}{c} - d \\ d \cdot - 12 \\ d \cdot 2 \\ d \cdot 6 \end{array}]$

Step 1.6.3

Move $- 12$ to the left of $d$ .

$[\begin{array}{c} - 2 a \\ - 4 a \\ a \\ a \end{array}] + [\begin{array}{c} 3 b \\ - 4 b \\ 0 \\ 4 b \end{array}] + [\begin{array}{c} - d \\ - 12 d \\ d \cdot 2 \\ d \cdot 6 \end{array}]$

Step 1.6.4

Move $2$ to the left of $d$ .

$[\begin{array}{c} - 2 a \\ - 4 a \\ a \\ a \end{array}] + [\begin{array}{c} 3 b \\ - 4 b \\ 0 \\ 4 b \end{array}] + [\begin{array}{c} - d \\ - 12 d \\ 2 d \\ d \cdot 6 \end{array}]$

Step 1.6.5

Move $6$ to the left of $d$ .

$[\begin{array}{c} - 2 a \\ - 4 a \\ a \\ a \end{array}] + [\begin{array}{c} 3 b \\ - 4 b \\ 0 \\ 4 b \end{array}] + [\begin{array}{c} - d \\ - 12 d \\ 2 d \\ 6 d \end{array}]$

Step 2

Add the corresponding elements.

$[\begin{array}{c} - 2 a + 3 b \\ - 4 a - 4 b \\ a + 0 \\ a + 4 b \end{array}] + [\begin{array}{c} - d \\ - 12 d \\ 2 d \\ 6 d \end{array}]$

Step 3

Add $a$ and $0$ .

$[\begin{array}{c} - 2 a + 3 b \\ - 4 a - 4 b \\ a \\ a + 4 b \end{array}] + [\begin{array}{c} - d \\ - 12 d \\ 2 d \\ 6 d \end{array}]$

Step 4

Add the corresponding elements.

$[\begin{array}{c} - 2 a + 3 b - d \\ - 4 a - 4 b - 12 d \\ a + 2 d \\ a + 4 b + 6 d \end{array}]$