Question

prove that the matrix(1 -2
-2 4)is singular
​

Answer 1

Step-by-step explanation:

please mark me brainly answer

Answer 2

Answer:

Step-by-step explanation:

$\left[\begin{array}{ccc}1&-2\\-2&4\end{array}\right]$

= 1x4 - (4)

=4-4

= 0