Kunci Jawaban MTK Kelas 9 Halaman 58 59: Uji Kompetensi 1 Pangkat Nol, Pangkat Negatif, Bentuk Akar

= b¹⸍² . 2 y⁵ × b³ . 6 y²
= b¹⸍²⁺³. 12 . y⁵⁺²
= b⁷⸍² . 12 . y⁷
= b⁷⸍² 12 y⁷

c. (tn³)⁴ × 4t³

= t⁴ n¹² × 4t³
= 4 n¹² t⁴⁺³
= 4 n¹² t⁷

d. (2x³) × 3(x²y²)³ × 5y⁴

= 2 x³ . 3 ×⁶ y⁶ . 5 y⁴
= 2 . 3 . 5 . x³ . x⁶ . y⁶ . y⁴
= 30 x³⁺⁶ y⁶⁺⁴
= 30 x⁹ y¹⁰

Nomor 5

a. 0,00000056 = 5,6 × 10⁻⁷
b. 2.500.000 = 2,5 × 10⁶
c. 0,98 = 9,8 × 10⁻¹
d. 10.000.000.000.000 = 1 × 10¹³

Nomor 6

a. a. 12 × 2³

= 12 × 8
= 96
= 9,6 × 10

b. 7,27 × 10² – 0,5 × 10³

= (7,27 × 100) – (0,5 × 1000)
= 727 – 500
= 227
= 2,27 × 10²