代数示例

$[\begin{array}{c} - 8 & - 14 & - 2 x \end{array}] - ([\begin{array}{c} - 19 & 17 & - 1 \end{array}] + [\begin{array}{c} 14 & 13 & - 2 \end{array}]) = [\begin{array}{c} - 3 & - 44 & - 9 \end{array}]$

解题步骤 1

化简每一项。

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解题步骤 1.1

加上相应元素。

$[\begin{array}{c} - 8 & - 14 & - 2 x \end{array}] - [\begin{array}{c} - 19 + 14 & 17 + 13 & - 1 - 2 \end{array}] = [\begin{array}{c} - 3 & - 44 & - 9 \end{array}]$

解题步骤 1.2

Simplify each element.

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解题步骤 1.2.1

将 $- 19$ 和 $14$ 相加。

$[\begin{array}{c} - 8 & - 14 & - 2 x \end{array}] - [\begin{array}{c} - 5 & 17 + 13 & - 1 - 2 \end{array}] = [\begin{array}{c} - 3 & - 44 & - 9 \end{array}]$

解题步骤 1.2.2

将 $17$ 和 $13$ 相加。

$[\begin{array}{c} - 8 & - 14 & - 2 x \end{array}] - [\begin{array}{c} - 5 & 30 & - 1 - 2 \end{array}] = [\begin{array}{c} - 3 & - 44 & - 9 \end{array}]$

解题步骤 1.2.3

从 $- 1$ 中减去 $2$ 。

$[\begin{array}{c} - 8 & - 14 & - 2 x \end{array}] - [\begin{array}{c} - 5 & 30 & - 3 \end{array}] = [\begin{array}{c} - 3 & - 44 & - 9 \end{array}]$

解题步骤 1.3

将 $- 1$ 乘以矩阵中的每一个元素。

$[\begin{array}{c} - 8 & - 14 & - 2 x \end{array}] + [\begin{array}{c} - - 5 & - 1 \cdot 30 & - - 3 \end{array}] = [\begin{array}{c} - 3 & - 44 & - 9 \end{array}]$

解题步骤 1.4

化简矩阵中的每一个元素。

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解题步骤 1.4.1

将 $- 1$ 乘以 $- 5$ 。

$[\begin{array}{c} - 8 & - 14 & - 2 x \end{array}] + [\begin{array}{c} 5 & - 1 \cdot 30 & - - 3 \end{array}] = [\begin{array}{c} - 3 & - 44 & - 9 \end{array}]$

解题步骤 1.4.2

将 $- 1$ 乘以 $30$ 。

$[\begin{array}{c} - 8 & - 14 & - 2 x \end{array}] + [\begin{array}{c} 5 & - 30 & - - 3 \end{array}] = [\begin{array}{c} - 3 & - 44 & - 9 \end{array}]$

解题步骤 1.4.3

将 $- 1$ 乘以 $- 3$ 。

$[\begin{array}{c} - 8 & - 14 & - 2 x \end{array}] + [\begin{array}{c} 5 & - 30 & 3 \end{array}] = [\begin{array}{c} - 3 & - 44 & - 9 \end{array}]$

解题步骤 2

加上相应元素。

$[\begin{array}{c} - 8 + 5 & - 14 - 30 & - 2 x + 3 \end{array}] = [\begin{array}{c} - 3 & - 44 & - 9 \end{array}]$

解题步骤 3

Simplify each element.

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解题步骤 3.1

将 $- 8$ 和 $5$ 相加。

$[\begin{array}{c} - 3 & - 14 - 30 & - 2 x + 3 \end{array}] = [\begin{array}{c} - 3 & - 44 & - 9 \end{array}]$

解题步骤 3.2

从 $- 14$ 中减去 $30$ 。

$[\begin{array}{c} - 3 & - 44 & - 2 x + 3 \end{array}] = [\begin{array}{c} - 3 & - 44 & - 9 \end{array}]$

解题步骤 4

Write as a linear system of equations.

$- 3 = - 3$

$- 44 = - 44$

$- 2 x + 3 = - 9$

解题步骤 5

Since $- 44 = - 44$ is always true, the matrix equation has infinite solutions.

Infinite solutions satisfying $- 2 x + 3 = - 9$ .

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