1 6 4 4 1 √2 × √4 × √ × √ 1 2 8 2 8 (−2) × (−2) 3 = ⋯ (−2) 9 1 1 1 8 3 + 16 2 + 25 2 = ⋯ 3 2 2 ( 2 ) × ( ) = ⋯ −3 3 2 3 1 −2 = 64 3 + 81 4 − ( ) … 5 22