Álgebra linear Exemplos

$[\begin{array}{c} - 2 & 2 & - 6 \\ - 8 & - 9 x & - 18 \\ - 13 & 17 & 7 \end{array}] + [\begin{array}{c} 8 & - 9 & 17 \\ 1 & - 7 & - 16 \\ 5 & - 6 & 14 \end{array}] - [\begin{array}{c} - 6 & - 4 & 1 \\ 20 & 5 & - 17 \\ 13 & 19 & 7 \end{array}] = [\begin{array}{c} 12 & - 3 & 10 \\ - 27 & 6 & - 17 \\ - 21 & - 8 & 14 \end{array}]$

Etapa 1

Adicione os elementos correspondentes.

$[\begin{array}{c} - 2 + 8 & 2 - 9 & - 6 + 17 \\ - 8 + 1 & - 9 x - 7 & - 18 - 16 \\ - 13 + 5 & 17 - 6 & 7 + 14 \end{array}] - [\begin{array}{c} - 6 & - 4 & 1 \\ 20 & 5 & - 17 \\ 13 & 19 & 7 \end{array}] = [\begin{array}{c} 12 & - 3 & 10 \\ - 27 & 6 & - 17 \\ - 21 & - 8 & 14 \end{array}]$

Etapa 2

Simplify each element.

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Etapa 2.1

Some $- 2$ e $8$ .

$[\begin{array}{c} 6 & 2 - 9 & - 6 + 17 \\ - 8 + 1 & - 9 x - 7 & - 18 - 16 \\ - 13 + 5 & 17 - 6 & 7 + 14 \end{array}] - [\begin{array}{c} - 6 & - 4 & 1 \\ 20 & 5 & - 17 \\ 13 & 19 & 7 \end{array}] = [\begin{array}{c} 12 & - 3 & 10 \\ - 27 & 6 & - 17 \\ - 21 & - 8 & 14 \end{array}]$

Etapa 2.2

Subtraia $9$ de $2$ .

$[\begin{array}{c} 6 & - 7 & - 6 + 17 \\ - 8 + 1 & - 9 x - 7 & - 18 - 16 \\ - 13 + 5 & 17 - 6 & 7 + 14 \end{array}] - [\begin{array}{c} - 6 & - 4 & 1 \\ 20 & 5 & - 17 \\ 13 & 19 & 7 \end{array}] = [\begin{array}{c} 12 & - 3 & 10 \\ - 27 & 6 & - 17 \\ - 21 & - 8 & 14 \end{array}]$

Etapa 2.3

Some $- 6$ e $17$ .

$[\begin{array}{c} 6 & - 7 & 11 \\ - 8 + 1 & - 9 x - 7 & - 18 - 16 \\ - 13 + 5 & 17 - 6 & 7 + 14 \end{array}] - [\begin{array}{c} - 6 & - 4 & 1 \\ 20 & 5 & - 17 \\ 13 & 19 & 7 \end{array}] = [\begin{array}{c} 12 & - 3 & 10 \\ - 27 & 6 & - 17 \\ - 21 & - 8 & 14 \end{array}]$

Etapa 2.4

Some $- 8$ e $1$ .

$[\begin{array}{c} 6 & - 7 & 11 \\ - 7 & - 9 x - 7 & - 18 - 16 \\ - 13 + 5 & 17 - 6 & 7 + 14 \end{array}] - [\begin{array}{c} - 6 & - 4 & 1 \\ 20 & 5 & - 17 \\ 13 & 19 & 7 \end{array}] = [\begin{array}{c} 12 & - 3 & 10 \\ - 27 & 6 & - 17 \\ - 21 & - 8 & 14 \end{array}]$

Etapa 2.5

Subtraia $16$ de $- 18$ .

$[\begin{array}{c} 6 & - 7 & 11 \\ - 7 & - 9 x - 7 & - 34 \\ - 13 + 5 & 17 - 6 & 7 + 14 \end{array}] - [\begin{array}{c} - 6 & - 4 & 1 \\ 20 & 5 & - 17 \\ 13 & 19 & 7 \end{array}] = [\begin{array}{c} 12 & - 3 & 10 \\ - 27 & 6 & - 17 \\ - 21 & - 8 & 14 \end{array}]$

Etapa 2.6

Some $- 13$ e $5$ .

$[\begin{array}{c} 6 & - 7 & 11 \\ - 7 & - 9 x - 7 & - 34 \\ - 8 & 17 - 6 & 7 + 14 \end{array}] - [\begin{array}{c} - 6 & - 4 & 1 \\ 20 & 5 & - 17 \\ 13 & 19 & 7 \end{array}] = [\begin{array}{c} 12 & - 3 & 10 \\ - 27 & 6 & - 17 \\ - 21 & - 8 & 14 \end{array}]$

Etapa 2.7

Subtraia $6$ de $17$ .

$[\begin{array}{c} 6 & - 7 & 11 \\ - 7 & - 9 x - 7 & - 34 \\ - 8 & 11 & 7 + 14 \end{array}] - [\begin{array}{c} - 6 & - 4 & 1 \\ 20 & 5 & - 17 \\ 13 & 19 & 7 \end{array}] = [\begin{array}{c} 12 & - 3 & 10 \\ - 27 & 6 & - 17 \\ - 21 & - 8 & 14 \end{array}]$

Etapa 2.8

Some $7$ e $14$ .

$[\begin{array}{c} 6 & - 7 & 11 \\ - 7 & - 9 x - 7 & - 34 \\ - 8 & 11 & 21 \end{array}] - [\begin{array}{c} - 6 & - 4 & 1 \\ 20 & 5 & - 17 \\ 13 & 19 & 7 \end{array}] = [\begin{array}{c} 12 & - 3 & 10 \\ - 27 & 6 & - 17 \\ - 21 & - 8 & 14 \end{array}]$

Etapa 3

Subtraia os elementos correspondentes.

$[\begin{array}{c} 6 + 6 & - 7 + 4 & 11 - 1 \\ - 7 - 20 & - 9 x - 7 - 5 & - 34 + 17 \\ - 8 - 13 & 11 - 19 & 21 - 7 \end{array}] = [\begin{array}{c} 12 & - 3 & 10 \\ - 27 & 6 & - 17 \\ - 21 & - 8 & 14 \end{array}]$

Etapa 4

Simplify each element.

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Etapa 4.1

Some $6$ e $6$ .

$[\begin{array}{c} 12 & - 7 + 4 & 11 - 1 \\ - 7 - 20 & - 9 x - 7 - 5 & - 34 + 17 \\ - 8 - 13 & 11 - 19 & 21 - 7 \end{array}] = [\begin{array}{c} 12 & - 3 & 10 \\ - 27 & 6 & - 17 \\ - 21 & - 8 & 14 \end{array}]$

Etapa 4.2

Some $- 7$ e $4$ .

$[\begin{array}{c} 12 & - 3 & 11 - 1 \\ - 7 - 20 & - 9 x - 7 - 5 & - 34 + 17 \\ - 8 - 13 & 11 - 19 & 21 - 7 \end{array}] = [\begin{array}{c} 12 & - 3 & 10 \\ - 27 & 6 & - 17 \\ - 21 & - 8 & 14 \end{array}]$

Etapa 4.3

Subtraia $1$ de $11$ .

$[\begin{array}{c} 12 & - 3 & 10 \\ - 7 - 20 & - 9 x - 7 - 5 & - 34 + 17 \\ - 8 - 13 & 11 - 19 & 21 - 7 \end{array}] = [\begin{array}{c} 12 & - 3 & 10 \\ - 27 & 6 & - 17 \\ - 21 & - 8 & 14 \end{array}]$

Etapa 4.4

Subtraia $20$ de $- 7$ .

$[\begin{array}{c} 12 & - 3 & 10 \\ - 27 & - 9 x - 7 - 5 & - 34 + 17 \\ - 8 - 13 & 11 - 19 & 21 - 7 \end{array}] = [\begin{array}{c} 12 & - 3 & 10 \\ - 27 & 6 & - 17 \\ - 21 & - 8 & 14 \end{array}]$

Etapa 4.5

Subtraia $5$ de $- 7$ .

$[\begin{array}{c} 12 & - 3 & 10 \\ - 27 & - 9 x - 12 & - 34 + 17 \\ - 8 - 13 & 11 - 19 & 21 - 7 \end{array}] = [\begin{array}{c} 12 & - 3 & 10 \\ - 27 & 6 & - 17 \\ - 21 & - 8 & 14 \end{array}]$

Etapa 4.6

Some $- 34$ e $17$ .

$[\begin{array}{c} 12 & - 3 & 10 \\ - 27 & - 9 x - 12 & - 17 \\ - 8 - 13 & 11 - 19 & 21 - 7 \end{array}] = [\begin{array}{c} 12 & - 3 & 10 \\ - 27 & 6 & - 17 \\ - 21 & - 8 & 14 \end{array}]$

Etapa 4.7

Subtraia $13$ de $- 8$ .

$[\begin{array}{c} 12 & - 3 & 10 \\ - 27 & - 9 x - 12 & - 17 \\ - 21 & 11 - 19 & 21 - 7 \end{array}] = [\begin{array}{c} 12 & - 3 & 10 \\ - 27 & 6 & - 17 \\ - 21 & - 8 & 14 \end{array}]$

Etapa 4.8

Subtraia $19$ de $11$ .

$[\begin{array}{c} 12 & - 3 & 10 \\ - 27 & - 9 x - 12 & - 17 \\ - 21 & - 8 & 21 - 7 \end{array}] = [\begin{array}{c} 12 & - 3 & 10 \\ - 27 & 6 & - 17 \\ - 21 & - 8 & 14 \end{array}]$

Etapa 4.9

Subtraia $7$ de $21$ .

$[\begin{array}{c} 12 & - 3 & 10 \\ - 27 & - 9 x - 12 & - 17 \\ - 21 & - 8 & 14 \end{array}] = [\begin{array}{c} 12 & - 3 & 10 \\ - 27 & 6 & - 17 \\ - 21 & - 8 & 14 \end{array}]$

Etapa 5

Write as a linear system of equations.

$12 = 12$

$- 3 = - 3$

$10 = 10$

$- 27 = - 27$

$- 9 x - 12 = 6$

$- 17 = - 17$

$- 21 = - 21$

$- 8 = - 8$

$14 = 14$

Etapa 6

Since $14 = 14$ is always true, the matrix equation has infinite solutions.

Infinite solutions satisfying $- 9 x - 12 = 6$ .