Question

value of (5+√5) (5-√5)​

Answer 1

Step-by-step explanation:

first we multiply both and then solve

Answer 2

Step-by-step explanation:

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

$Formula : -$

$(a +b )(a - b) = {a}^{2} - {b}^{2}$

$a = 5 \: and \: b = \sqrt{5}$

${(5)}^{2} - {( \sqrt{5}) }^{2}$

$25 - 5$

$20$

I hope it is helpful