Bantu dong soal matematika (6+√5)×(6-√5)=

(6 + √5) (6 – √5)

= (6×6) – 6√5 + 6√5 –√(5×5)
= 36 – 5
= 31

Rumus:
(a + b) × (a - b) = a² - b²

(6 + √5) × (6 - √5)
= (6)² - (√5)²
= 36 - √25
= 36 - 5
= 31