Question

quanto é 5/3.(2/3)^-2+6.(2/2-(1/3))

Answer 1

            5/3 (2/3)⁻² + 6 (2/2 -(1/3)) =
            5/3 (3/2)² +  6 (1 - 1/3) =
            5/3 . 9/4  +  6 - 6/3 =
            45/12  + 6 - 2 =
            45/12 + 4 =
             93/12 = 31/4