Question

simplify
$( \sqrt 5 - \ \sqrt{2) } \: ( \sqrt{5 } + \sqrt{2)}$
​

Answer 1

Step-by-step explanation:

(√5)²-(√2)²

= 5-2

=3

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Answer 2

$( \sqrt 5 - \ \sqrt{2) } \: ( \sqrt{5 } + \sqrt{2)}$

it is in the form (a+b) (a-b)

= a² - b²

(√5)² - (√2)² = (5 - 2)

= 3

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