Hasil dari 25² + 15² − 8² adalah….

Hasil dari 25² + 15² − 8² adalah….
a. 491
b. 686
c. 786
d. 834

Jawaban : C

Ingat!
Konsep bilangan berpangkat
aⁿ = a × a × … × a (perkalian sebanyak n)

Pembahasan :
25² + 15² − 8²
= (25 × 25) + (15 × 15) – (8 × 8)
= 625 + 225 – 64
= 850 – 64
= 786

Jadi, Hasil dari 25² + 15² − 8² adalah 786

Oleh karena itu, jawaban yang benar adalah C

Baca Juga :  Miss Silvia works at Graha Hospital. She looks after sick children at night. She starts to work at 10 p.m. and finishes at 7 o'clock in the morning. She goes to work by a motorcycle. She has twenty children in her section. She stays up all night. She looks at the children many times during the night. She sometimes sits and talks to a child. The children sleep most of the time. She usually wakes up them at 5 a.m. and gives them breakfast at 6 a.m. After that, she goes home at 7 a.m. Although she feels very tired, she loves her job