If `A=((2,-1),(-1,2))` and I is the unit matrix of order 2, then `A^(2)` is equal to -

If A=[(2,-1),(-1,2)] and l is the unit matrix of order 2, then A^(2) equals to

If A=[(1, 0,0),(0,1,0),(a,b,-1)] and I is the unit matrix of order 3, then A^(2)+2A^(4)+4A^(6) is equal to

If A= [[1,2],[-3,-4]] and l is the identity matrix of order 2 then A^(2) equals "

If A=[[2,-1-1,2]] and I is the identity matrix of order 2, then show that A^(2)=4a-3I Hence find A^(-1).