The given T is a linear transformation from R2 into R2. Show that T is invertible and find a formula for T T (X1,X2) = (2X1 - 5X2, -2x1 +7x2) To show that T is invertible, calculate the determinant of the standard matrix for T. The determinant of the standard matrix is (Simplify your answer.) T -1 ( * 1 , * 2 ) = [ (Type an ordered pair. Type an expression using x, and X2 as the variables.)