Finite Math Examples

$3 \cdot [\begin{array}{c} 5 & 0 \\ - 1 & 3 \\ 4 & 7 \end{array}] + 2 \cdot [\begin{array}{c} 4 & 10 \\ - 2 & - 3 \\ 6 & 9 \end{array}]$

Step 1

Simplify each term.

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Step 1.1

Multiply $3$ by each element of the matrix.

$[\begin{array}{c} 3 \cdot 5 & 3 \cdot 0 \\ 3 \cdot - 1 & 3 \cdot 3 \\ 3 \cdot 4 & 3 \cdot 7 \end{array}] + 2 \cdot [\begin{array}{c} 4 & 10 \\ - 2 & - 3 \\ 6 & 9 \end{array}]$

Step 1.2

Simplify each element in the matrix.

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Step 1.2.1

Multiply $3$ by $5$ .

$[\begin{array}{c} 15 & 3 \cdot 0 \\ 3 \cdot - 1 & 3 \cdot 3 \\ 3 \cdot 4 & 3 \cdot 7 \end{array}] + 2 \cdot [\begin{array}{c} 4 & 10 \\ - 2 & - 3 \\ 6 & 9 \end{array}]$

Step 1.2.2

Multiply $3$ by $0$ .

$[\begin{array}{c} 15 & 0 \\ 3 \cdot - 1 & 3 \cdot 3 \\ 3 \cdot 4 & 3 \cdot 7 \end{array}] + 2 \cdot [\begin{array}{c} 4 & 10 \\ - 2 & - 3 \\ 6 & 9 \end{array}]$

Step 1.2.3

Multiply $3$ by $- 1$ .

$[\begin{array}{c} 15 & 0 \\ - 3 & 3 \cdot 3 \\ 3 \cdot 4 & 3 \cdot 7 \end{array}] + 2 \cdot [\begin{array}{c} 4 & 10 \\ - 2 & - 3 \\ 6 & 9 \end{array}]$

Step 1.2.4

Multiply $3$ by $3$ .

$[\begin{array}{c} 15 & 0 \\ - 3 & 9 \\ 3 \cdot 4 & 3 \cdot 7 \end{array}] + 2 \cdot [\begin{array}{c} 4 & 10 \\ - 2 & - 3 \\ 6 & 9 \end{array}]$

Step 1.2.5

Multiply $3$ by $4$ .

$[\begin{array}{c} 15 & 0 \\ - 3 & 9 \\ 12 & 3 \cdot 7 \end{array}] + 2 \cdot [\begin{array}{c} 4 & 10 \\ - 2 & - 3 \\ 6 & 9 \end{array}]$

Step 1.2.6

Multiply $3$ by $7$ .

$[\begin{array}{c} 15 & 0 \\ - 3 & 9 \\ 12 & 21 \end{array}] + 2 \cdot [\begin{array}{c} 4 & 10 \\ - 2 & - 3 \\ 6 & 9 \end{array}]$

Step 1.3

Multiply $2$ by each element of the matrix.

$[\begin{array}{c} 15 & 0 \\ - 3 & 9 \\ 12 & 21 \end{array}] + [\begin{array}{c} 2 \cdot 4 & 2 \cdot 10 \\ 2 \cdot - 2 & 2 \cdot - 3 \\ 2 \cdot 6 & 2 \cdot 9 \end{array}]$

Step 1.4

Simplify each element in the matrix.

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Step 1.4.1

Multiply $2$ by $4$ .

$[\begin{array}{c} 15 & 0 \\ - 3 & 9 \\ 12 & 21 \end{array}] + [\begin{array}{c} 8 & 2 \cdot 10 \\ 2 \cdot - 2 & 2 \cdot - 3 \\ 2 \cdot 6 & 2 \cdot 9 \end{array}]$

Step 1.4.2

Multiply $2$ by $10$ .

$[\begin{array}{c} 15 & 0 \\ - 3 & 9 \\ 12 & 21 \end{array}] + [\begin{array}{c} 8 & 20 \\ 2 \cdot - 2 & 2 \cdot - 3 \\ 2 \cdot 6 & 2 \cdot 9 \end{array}]$

Step 1.4.3

Multiply $2$ by $- 2$ .

$[\begin{array}{c} 15 & 0 \\ - 3 & 9 \\ 12 & 21 \end{array}] + [\begin{array}{c} 8 & 20 \\ - 4 & 2 \cdot - 3 \\ 2 \cdot 6 & 2 \cdot 9 \end{array}]$

Step 1.4.4

Multiply $2$ by $- 3$ .

$[\begin{array}{c} 15 & 0 \\ - 3 & 9 \\ 12 & 21 \end{array}] + [\begin{array}{c} 8 & 20 \\ - 4 & - 6 \\ 2 \cdot 6 & 2 \cdot 9 \end{array}]$

Step 1.4.5

Multiply $2$ by $6$ .

$[\begin{array}{c} 15 & 0 \\ - 3 & 9 \\ 12 & 21 \end{array}] + [\begin{array}{c} 8 & 20 \\ - 4 & - 6 \\ 12 & 2 \cdot 9 \end{array}]$

Step 1.4.6

Multiply $2$ by $9$ .

$[\begin{array}{c} 15 & 0 \\ - 3 & 9 \\ 12 & 21 \end{array}] + [\begin{array}{c} 8 & 20 \\ - 4 & - 6 \\ 12 & 18 \end{array}]$

Step 2

Add the corresponding elements.

$[\begin{array}{c} 15 + 8 & 0 + 20 \\ - 3 - 4 & 9 - 6 \\ 12 + 12 & 21 + 18 \end{array}]$

Step 3

Simplify each element.

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Step 3.1

Add $15$ and $8$ .

$[\begin{array}{c} 23 & 0 + 20 \\ - 3 - 4 & 9 - 6 \\ 12 + 12 & 21 + 18 \end{array}]$

Step 3.2

Add $0$ and $20$ .

$[\begin{array}{c} 23 & 20 \\ - 3 - 4 & 9 - 6 \\ 12 + 12 & 21 + 18 \end{array}]$

Step 3.3

Subtract $4$ from $- 3$ .

$[\begin{array}{c} 23 & 20 \\ - 7 & 9 - 6 \\ 12 + 12 & 21 + 18 \end{array}]$

Step 3.4

Subtract $6$ from $9$ .

$[\begin{array}{c} 23 & 20 \\ - 7 & 3 \\ 12 + 12 & 21 + 18 \end{array}]$

Step 3.5

Add $12$ and $12$ .

$[\begin{array}{c} 23 & 20 \\ - 7 & 3 \\ 24 & 21 + 18 \end{array}]$

Step 3.6

Add $21$ and $18$ .

$[\begin{array}{c} 23 & 20 \\ - 7 & 3 \\ 24 & 39 \end{array}]$