Question

The value of under root 5 + under root 2 into under root 5 minus under root 2 is

Answer 1

$\sqrt{5} + \sqrt{2} \times \sqrt{5} - \sqrt{2} \\ ( \sqrt{5} - \sqrt{2} )( \sqrt{5} + \sqrt{2} ) \\ ( \sqrt{5} ) ^{2} - ( \sqrt{2} )^{2} \\ 5 - 2 \\ = 3 \\ hope \: it \: helps \:$

Answer 2

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3 is your answer.