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Verified answer
Bab Bilangan IrrasionalMatematika SMP Kelas IX
(√7 - √5) / (√5 - √8) = (√7 - √5) (√5 + √8) / (√5² - √8²)
= (√35 + √56 - √5² - √40) / (5 - 8)
= (√35 + 2√14 - 5 - 2√10)/-3
= (5 + 2√10 - √35 - 2√14)/3