If A={1,2,3),then find `A^2`.

If A=[{:(-2,3),(1,2):}] and B=[{:(-1,0),(1,2):}] , then find (A+2B)' .

If A = [[1,2],[3,2]] , find the value of |2A| - 4|A| .

If A=[(2,-1),(3,2)] and B =[(0,4),(-1,7)] , then find 3A^(2) -2B+1 .

If A = [(-2, 3),(1,2)] and B = [(-1, 0),(1, 2)] then find (A + 2B) .

If O is the origin, OP = 3 with the direction cosines of OP is - (1)/(3) , (2)/(3), - (2)/(3), then find the coordinates of P .

If f(x)=x^2-3x+2, A=[(3,1),(-2,0)] , find f(A)

If [2a-1] [(2),(3)]=[7] . Then find a.