Contoh Soal Matematika Kelas 9 SMP MTs Semester 1, Lengkap Kunci Jawaban Terupdate

a. y³ × 2y⁷ × (3y)²

Jawaban:
= y³ × 2 × y⁷ × 9y²
= 2 × 9 × y³ × y⁷ × y²
= 18 × y²⁺⁷⁺²
= 18y¹²

b. b × 2y² × b³ × y²

Jawaban:
= 2 × b × b³ × y⁷ × y²
= 2b⁴y⁹

c. 3m³ × (mn)⁴

Jawaban:
= 3 × m³ × m⁴ × n⁴
= 3m⁷n⁴

d. (tn³)⁴ × 4t³

Jawaban:
= t⁴ × n¹² × 4 × t³
= 4n¹²t⁴⁺³
= 4n¹²t⁷

e. (2x³) × 3(x²y²)³ × 5y⁴

Jawaban:
= 2 . x³ . 3 . x⁶ . y⁶. 5. y⁴
= 2 . 3 . 5 . x³ . x⁶. y⁶. y⁴
= 30 . x³⁺⁶ . y⁶⁺⁴
= 30x⁹y¹⁰