Question

please ans me & step to step explaination ​

Answer 1

hope it helps you mate....

Answer 2

Answer:

1

Step-by-step explanation:

det. A for a 2 x 2 matrix say $\left[\begin{array}{ccc}a&b\\c&d\end{array}\right]$is given by ad - bc.

Here,

a = 5, d = - 4    &  b = 3 ,c = - 7

So,

⇒ ad - bc  

⇒ 5(-4) - [ 3(-7) ]

⇒ - 20 - [-21]

⇒ -20 + 21

⇒ 1