Issolvi {|c|c|}hline22.5-27.5&{38}hline27.5-32.5&{25}

$$\left. \begin{array} { | c | c | } \hline 22.5 - 27.5 & { 38 } \\ \hline 27.5 - 32.5 & { 25 } \end{array} \right.$$

Ikkalkola d-Determinanti

$$65$$

Passi għall-Użu ta' Regola Djagonali

Naqqas 27.5 minn 22.5 biex tikseb -5.

$$det(\left(\begin{matrix}-5&38\\27.5-32.5&25\end{matrix}\right))$$

Naqqas 32.5 minn 27.5 biex tikseb -5.

$$det(\left(\begin{matrix}-5&38\\-5&25\end{matrix}\right))$$

Għall-matriċi 2\times 2 \left(\begin{matrix}a&b\\c&d\end{matrix}\right), id-determinant huwa ad-bc.

$$-5\times 25-38\left(-5\right)$$

Immultiplika -5 b'25.

$$-125-38\left(-5\right)$$

Immultiplika 38 b'-5.

$$-125-\left(-190\right)$$

Naqqas -190 minn -125.

$$65$$

Evalwa

$$\left(\begin{matrix}-5&38\\-5&25\end{matrix}\right)$$