If A= then A2 – 4A = ?

A2 == A2 – 4A = -4= -= = 5 = 5I

Q45 of 98 Page 314

If A= then A² – 4A = ?

A² =

A² – 4A = -4

= -

= 5

= 5I

If A is an invertible matrix and A^-1 = then A=?

If A= and ƒ(x)=2x² – 4x + 5 then ƒ(A)=?

If A is a 2-rowed square matrix and │A│=6 then =?

If A is an invertible square matrix and k is a non-negative real number then (KA)^-1=?