Question

give answer to this question please

Answer 1

Finding Co-factor:

Step-by-step explanation:

$\ Given \ value: \\\\ \left[\begin{array}{ccc}1&-2\\3&-1\\\end{array}\right] \\\\\ find:\\\\\ co- factor = ?\\\\\ Solution:\\\\\ Formula:\\\\\ co- factor = \ a_{11} \times \ a_{22} - \ a_{12} \times a_{21} \\\\ \ value: \ \left[\begin{array}{ccc}1&-2\\3&-1\\\end{array}\right] \\\\\rightarrow \ co- factor = \ 1 \times \ (-1) - (\ (-2) \times 3) \\\\\rightarrow \ co- factor = \ -1 - ( - 6) \\\\\rightarrow \ co- factor = \ -1 + 6) \\\\\rightarrow \ co- factor = \ 5$

Learn more:

• Co-factor: https://brainly.in/question/15752088