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Verified answer
(√3 - √5)²= (√3)² + 2(√3)(- √5) + (√5)²
= 3 - 2√15 + 5
= 8 - 2√15
(√3 + √5)²
= (√3)² + 2(√3)(√5) + (√5)²
= 3 + 2√15 + 5
= 8 + 2√15
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