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Verified answer
1.) √(5/8) =√(10 × 1/16) =
√(10 × 2^-4) =
2^-2√10
2.) √(3/18) =
√(6 × 1/36) =
√(6 × 6^-2) =
6^-1√6
3.) (√(2/3)) (√(8)) =
√(16/3) =
√(64/12) =
8^-1√12
4.) (√(3/4)) (√(15)) =
√(45/4) =
(3/2)√5
5.) 4 + √2 / √7 =
(4 + √2 / √7) × (√7) / √7) =
(4√7 + √14) / 7
Verified answer
Bab Bilangan IrrasionalMatematika SMP Kelas IX
1] √(5/8) = (√5)/√8
= ((√5)/2√2) x ((√2)/√2)
= (√10)/(2 . √2²)
= (√10) / (2 . 2)
= (1/4) √10
2] √(3/18) = √(1/6)
= (√1)/√6
= (1/√6) . ((√6)/√6)
= (1/6) √6
3] √(2/3) . √8 = √(16/3)
= (√16)/√3 . ((√3)/√3)
= (4/3) √3
4] √(3/4) . √15 = √(45) / √4
= (1/2) . √(9 x 5)
= (3/2) √5
5] (4 + √2) / √7 = ((4 + √2)/√7) . ((√7)/√7)
= (1/7) (4√7 + √14)