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Verified answer
Kelas 9 MatematikaBab Akar dan Pangkat
(3√2 + 2√5) (3√2 - 2√5)/(2 + √5)
= ((3√2)² - (2√5)²)/(2 + √5) . (2 - √5)/(2 - √5)
= (18 - 20) (2 - √5) / (4 - 5)
= 4 - 2√5
Verified answer
Kelas 10 Matematika Bab 1 - Pangkat AkaSifat (p√a - q√b)(p√a + q√b) = p²a - q²b
Rasionalkan
= 2(2 - √5)
= 4 - 2√5