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Step-by-step explanation:
Here we can use (a + b)(a - b) = a² - b² formula.
So (√5 + √3)(√5 - √3)
{Using a² - b² = (a + b)(a - b)}
= (√5)² - (√3)²
= 5 - 3
{ √5 × √5 = 5 and √3 × √3 }
= 2
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