Question

simplify each of the following expression
$( \sqrt{5} - \sqrt{2} )( \sqrt{5} + \sqrt{2} )$
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Answer 1

(√ a+ √ b)(√ a-√ b)=a - b
So the answer is
(√ 5)^2-(√2)^2
=5 - 2 =3

Answer 2

Answer:

$\mathcal{\huge{\underline{\underline{\blue{SOLUTION:-}}}}}$

$( \sqrt{5} + \sqrt{2} )( \sqrt{5} - \sqrt{2} ) \\ \\ { \sqrt{5} }^{2} - { \sqrt{2} }^{2} \\ \\ 5 - 2 \\ = 3$