Question

Find the value of the following determinant
|-1 7|
|2 4|​

Answer 1

Answer:

-1x4 - 2x7

= -4 - 14

= -18

Explanation:

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Answer 2

Answer:

$-18$

Step-by-step explanation:

$\left[\begin{array}{ccc}-1&7\\2&4\end{array}\right] \\\\=-1(4)-7(2)\\=-4-14\\=-18$