Question

(√7-√5) (√7+√5) find the product (×)

Answer 1

Step-by-step explanation:

$( \sqrt{7} - \sqrt{5} )( \sqrt{7} + \sqrt{5} ) \\ let \: \sqrt{7} be \: (a) \\ \sqrt{5} be \: (b) \\ puttng \: the \: formula \: of \: (a + b)(a - b) = {a}^{2} + {b}^{2} \\ so \: \\ ( { \sqrt{7} }^{2} ) - ( { \sqrt{5} }^{2} ) \\ 7 - 5 \\ 2$

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