Álgebra lineal Ejemplos

$[\begin{array}{c} 11 & - 8 \\ - 17 & - 11 \\ 8 & - 12 \\ - 2 x & 3 \end{array}] + [\begin{array}{c} - 3 & 3 \\ - 17 & 12 \\ - 19 & 8 \\ - 15 & 2 \end{array}] - [\begin{array}{c} - 13 & 18 \\ 11 & - 16 \\ 0 & - 18 \\ 13 & - 7 \end{array}] = [\begin{array}{c} 21 & - 23 \\ - 45 & 17 \\ - 11 & 14 \\ - 24 & 12 \end{array}]$

Paso 1

Suma los elementos correspondientes.

$[\begin{array}{c} 11 - 3 & - 8 + 3 \\ - 17 - 17 & - 11 + 12 \\ 8 - 19 & - 12 + 8 \\ - 2 x - 15 & 3 + 2 \end{array}] - [\begin{array}{c} - 13 & 18 \\ 11 & - 16 \\ 0 & - 18 \\ 13 & - 7 \end{array}] = [\begin{array}{c} 21 & - 23 \\ - 45 & 17 \\ - 11 & 14 \\ - 24 & 12 \end{array}]$

Paso 2

Simplify each element.

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Paso 2.1

Resta $3$ de $11$ .

$[\begin{array}{c} 8 & - 8 + 3 \\ - 17 - 17 & - 11 + 12 \\ 8 - 19 & - 12 + 8 \\ - 2 x - 15 & 3 + 2 \end{array}] - [\begin{array}{c} - 13 & 18 \\ 11 & - 16 \\ 0 & - 18 \\ 13 & - 7 \end{array}] = [\begin{array}{c} 21 & - 23 \\ - 45 & 17 \\ - 11 & 14 \\ - 24 & 12 \end{array}]$

Paso 2.2

Suma $- 8$ y $3$ .

$[\begin{array}{c} 8 & - 5 \\ - 17 - 17 & - 11 + 12 \\ 8 - 19 & - 12 + 8 \\ - 2 x - 15 & 3 + 2 \end{array}] - [\begin{array}{c} - 13 & 18 \\ 11 & - 16 \\ 0 & - 18 \\ 13 & - 7 \end{array}] = [\begin{array}{c} 21 & - 23 \\ - 45 & 17 \\ - 11 & 14 \\ - 24 & 12 \end{array}]$

Paso 2.3

Resta $17$ de $- 17$ .

$[\begin{array}{c} 8 & - 5 \\ - 34 & - 11 + 12 \\ 8 - 19 & - 12 + 8 \\ - 2 x - 15 & 3 + 2 \end{array}] - [\begin{array}{c} - 13 & 18 \\ 11 & - 16 \\ 0 & - 18 \\ 13 & - 7 \end{array}] = [\begin{array}{c} 21 & - 23 \\ - 45 & 17 \\ - 11 & 14 \\ - 24 & 12 \end{array}]$

Paso 2.4

Suma $- 11$ y $12$ .

$[\begin{array}{c} 8 & - 5 \\ - 34 & 1 \\ 8 - 19 & - 12 + 8 \\ - 2 x - 15 & 3 + 2 \end{array}] - [\begin{array}{c} - 13 & 18 \\ 11 & - 16 \\ 0 & - 18 \\ 13 & - 7 \end{array}] = [\begin{array}{c} 21 & - 23 \\ - 45 & 17 \\ - 11 & 14 \\ - 24 & 12 \end{array}]$

Paso 2.5

Resta $19$ de $8$ .

$[\begin{array}{c} 8 & - 5 \\ - 34 & 1 \\ - 11 & - 12 + 8 \\ - 2 x - 15 & 3 + 2 \end{array}] - [\begin{array}{c} - 13 & 18 \\ 11 & - 16 \\ 0 & - 18 \\ 13 & - 7 \end{array}] = [\begin{array}{c} 21 & - 23 \\ - 45 & 17 \\ - 11 & 14 \\ - 24 & 12 \end{array}]$

Paso 2.6

Suma $- 12$ y $8$ .

$[\begin{array}{c} 8 & - 5 \\ - 34 & 1 \\ - 11 & - 4 \\ - 2 x - 15 & 3 + 2 \end{array}] - [\begin{array}{c} - 13 & 18 \\ 11 & - 16 \\ 0 & - 18 \\ 13 & - 7 \end{array}] = [\begin{array}{c} 21 & - 23 \\ - 45 & 17 \\ - 11 & 14 \\ - 24 & 12 \end{array}]$

Paso 2.7

Suma $3$ y $2$ .

$[\begin{array}{c} 8 & - 5 \\ - 34 & 1 \\ - 11 & - 4 \\ - 2 x - 15 & 5 \end{array}] - [\begin{array}{c} - 13 & 18 \\ 11 & - 16 \\ 0 & - 18 \\ 13 & - 7 \end{array}] = [\begin{array}{c} 21 & - 23 \\ - 45 & 17 \\ - 11 & 14 \\ - 24 & 12 \end{array}]$

Paso 3

Resta los elementos correspondientes.

$[\begin{array}{c} 8 + 13 & - 5 - 18 \\ - 34 - 11 & 1 + 16 \\ - 11 - 0 & - 4 + 18 \\ - 2 x - 15 - 13 & 5 + 7 \end{array}] = [\begin{array}{c} 21 & - 23 \\ - 45 & 17 \\ - 11 & 14 \\ - 24 & 12 \end{array}]$

Paso 4

Simplify each element.

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Paso 4.1

Suma $8$ y $13$ .

$[\begin{array}{c} 21 & - 5 - 18 \\ - 34 - 11 & 1 + 16 \\ - 11 - 0 & - 4 + 18 \\ - 2 x - 15 - 13 & 5 + 7 \end{array}] = [\begin{array}{c} 21 & - 23 \\ - 45 & 17 \\ - 11 & 14 \\ - 24 & 12 \end{array}]$

Paso 4.2

Resta $18$ de $- 5$ .

$[\begin{array}{c} 21 & - 23 \\ - 34 - 11 & 1 + 16 \\ - 11 - 0 & - 4 + 18 \\ - 2 x - 15 - 13 & 5 + 7 \end{array}] = [\begin{array}{c} 21 & - 23 \\ - 45 & 17 \\ - 11 & 14 \\ - 24 & 12 \end{array}]$

Paso 4.3

Resta $11$ de $- 34$ .

$[\begin{array}{c} 21 & - 23 \\ - 45 & 1 + 16 \\ - 11 - 0 & - 4 + 18 \\ - 2 x - 15 - 13 & 5 + 7 \end{array}] = [\begin{array}{c} 21 & - 23 \\ - 45 & 17 \\ - 11 & 14 \\ - 24 & 12 \end{array}]$

Paso 4.4

Suma $1$ y $16$ .

$[\begin{array}{c} 21 & - 23 \\ - 45 & 17 \\ - 11 - 0 & - 4 + 18 \\ - 2 x - 15 - 13 & 5 + 7 \end{array}] = [\begin{array}{c} 21 & - 23 \\ - 45 & 17 \\ - 11 & 14 \\ - 24 & 12 \end{array}]$

Paso 4.5

Resta $0$ de $- 11$ .

$[\begin{array}{c} 21 & - 23 \\ - 45 & 17 \\ - 11 & - 4 + 18 \\ - 2 x - 15 - 13 & 5 + 7 \end{array}] = [\begin{array}{c} 21 & - 23 \\ - 45 & 17 \\ - 11 & 14 \\ - 24 & 12 \end{array}]$

Paso 4.6

Suma $- 4$ y $18$ .

$[\begin{array}{c} 21 & - 23 \\ - 45 & 17 \\ - 11 & 14 \\ - 2 x - 15 - 13 & 5 + 7 \end{array}] = [\begin{array}{c} 21 & - 23 \\ - 45 & 17 \\ - 11 & 14 \\ - 24 & 12 \end{array}]$

Paso 4.7

Resta $13$ de $- 15$ .

$[\begin{array}{c} 21 & - 23 \\ - 45 & 17 \\ - 11 & 14 \\ - 2 x - 28 & 5 + 7 \end{array}] = [\begin{array}{c} 21 & - 23 \\ - 45 & 17 \\ - 11 & 14 \\ - 24 & 12 \end{array}]$

Paso 4.8

Suma $5$ y $7$ .

$[\begin{array}{c} 21 & - 23 \\ - 45 & 17 \\ - 11 & 14 \\ - 2 x - 28 & 12 \end{array}] = [\begin{array}{c} 21 & - 23 \\ - 45 & 17 \\ - 11 & 14 \\ - 24 & 12 \end{array}]$

Paso 5

Write as a linear system of equations.

$21 = 21$

$- 23 = - 23$

$- 45 = - 45$

$17 = 17$

$- 11 = - 11$

$14 = 14$

$- 2 x - 28 = - 24$

$12 = 12$

Paso 6

Since $12 = 12$ is always true, the matrix equation has infinite solutions.

Infinite solutions satisfying $- 2 x - 28 = - 24$ .