Question

Determinants and matrix %20%7C%20find%20%5C%3A%20determinant" id="TexFormula1" title=" | \frac{7}{4} \ \frac{9}{3} | find \: determinant" alt=" | \frac{7}{4} \ \frac{9}{3} | find \: determinant" align="absmiddle" class="latex-formula">
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Answer 1

Step-by-step explanation:

$\sf{| \frac{7}{4} \frac{9}{3} | = a}∣4739∣=a\sf \: |a| = ad - bc∣a∣=ad−bc\sf\: |a| = (7 \times 3) - (9 \times 4)∣a∣=(7×3)−(9×4)\sf \: |a| = 21 - 36∣a∣=21−36\sf \: |a| = \bold{ \blue{ - 15}}∣a$

Answer 2

>> Answer

_________

$\ \:$

• $\sf{| \frac{7}{4} \frac{9}{3} | = a}$

$\sf \: |a| = ad - bc$

$\sf\: |a| = (7 \times 3) - (9 \times 4)$

$\sf \: |a| = 21 - 36$

$\sf \: |a| = \bold{ \blue{ - 15}}$