Question

(5+✓5) (5-✓5) simplify

Answer 1

Answer:

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Step-by-step explanation:

(5+✓5) (5-✓5) = (5)² -(√5)²   [∵ the property says (a+b)(a-b)= a² - b²

                    = 25 - 5

                  =  20

Answer 2

Answer:

20

Step-by-step explanation:

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

$by applying the formula - ({a}^{2} - {b}^{2} ) = (a + b)(a - b)$

$= {5}^{2} - { \sqrt{5} }^{2}$

$= 25 - 5$

$= 20$