Finite Math Examples

$[\begin{array}{c} 1 & 1 & 1 & 17 \\ 4 & 5 & 6 & 23 \end{array}]$

Step 1

Perform the row operation $R_{2} = R_{2} - 4 R_{1}$ to make the entry at $2, 1$ a $0$ .

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Step 1.1

Perform the row operation $R_{2} = R_{2} - 4 R_{1}$ to make the entry at $2, 1$ a $0$ .

$[\begin{array}{c} 1 & 1 & 1 & 17 \\ 4 - 4 \cdot 1 & 5 - 4 \cdot 1 & 6 - 4 \cdot 1 & 23 - 4 \cdot 17 \end{array}]$

Step 1.2

Simplify $R_{2}$ .

$[\begin{array}{c} 1 & 1 & 1 & 17 \\ 0 & 1 & 2 & - 45 \end{array}]$

Step 2

Perform the row operation $R_{1} = R_{1} - R_{2}$ to make the entry at $1, 2$ a $0$ .

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Step 2.1

Perform the row operation $R_{1} = R_{1} - R_{2}$ to make the entry at $1, 2$ a $0$ .

$[\begin{array}{c} 1 - 0 & 1 - 1 & 1 - 2 & 17 + 45 \\ 0 & 1 & 2 & - 45 \end{array}]$

Step 2.2

Simplify $R_{1}$ .

$[\begin{array}{c} 1 & 0 & - 1 & 62 \\ 0 & 1 & 2 & - 45 \end{array}]$