Hi. How do you do this matrix question?
If A = [. 3. 2 ]
. . . . .[ -2 -1 ]
write A^2 in the form pA + qI where p and q are scalars. Hence write A^-1 in the form rA+sI where r and s are scalars.
I know how to find A^2, but I don't know how to put it in pA + qI form. Any help will be appreciated. Thank you!
If A = [. 3. 2 ]
. . . . .[ -2 -1 ]
write A^2 in the form pA + qI where p and q are scalars. Hence write A^-1 in the form rA+sI where r and s are scalars.
I know how to find A^2, but I don't know how to put it in pA + qI form. Any help will be appreciated. Thank you!