Question

Reduce the following matrix to normal form. -1 -2 3
-2 4 -1
-1 2 7
​

Answer 1

Answer:

$| - 1 \: - 2 \: \: 3 | \\ | - 2 \: \: 4 \: - 1| \\ | - 1 \: \: \: 2 \: \: \: \: \: 7|$

Step-by-step explanation:

$= - 1(7 \times 4) - ( - 1 \times 2) + 2( - 2 \times 7) - ( - 1 \times - 1) + 3( - 2 \times 2) - ( - 1 \times 4)$

$= - 1(28) - ( - 2) + 2( - 14) - (1) + 3 ( - 4) - ( - 4)$

$= - 1(30) + 2( - 15) + 3(0)$

$= - 30 - 30 + 0$

$= - 60$

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