a b Let A= Show A - 'A = 1. c d Perform the operation determined in the first step a + c ( Db + ( D)d ad - bc Da+ ( )c ()b + ( )d Simplify the expression above. Enter a 2 x2 matrix. How has it been shown that A ~ 'A = 1? A. By using matrix multiplication, it has been shown that each element of the simplified product A | A is equal to the corresponding element of B. By using matrix multiplication, it has been shown that a = b = c= d = 1. Therefore, A is the 2 x 2 matrix with all elements equal to 1, and A By using row reduction, it has been shown that the solution of the equation AX = I is X = A" . Therefore, XA" = A, and A- 1A =1. D. By using matrix multiplication, it has been shown that each element of the simplified product A A is equal to the corresponding element of 11/19/21 Homework 4 2 part 2 11:59pm