Jawapan

2016-09-11T07:44:11+08:00
12¹/₂ × 3¹/₂ × 9¹/₂
= √(12) × √(3) × √(9)
= √(12 × 3 × 9)
= √(36 × 9)
= √(4 × 9 × 9)
= √(2² × 3² × 3²)
= 2 × 3 × 3
= 18
=3/2/1 x 4/1/2
=3/2/1 x (2x2)1/2
=3/2/1 x 2/1/1
=9 x 2
=18
2016-09-11T21:04:08+08:00
12/1/2 ×3/1/2×9/1/2 = 415 5/8