Find the square root of 7-2√5

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Nuno Ribeiro · Answer 1 · 2021-04-12T12:26:05+0000

Answer:√5 - √2

Explanation:

= √(5 + 2 - 2√10 )

= √{(√5)² +(√2)² - 2.√5.√2}

= √(√5 - √2)² (by identity a² + b² -2ab = ( a-b)²)

= √5 - √2

Find the square root of 7-2√5

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Find the square root of 7-2√5