Question

write the value of (5+√5)(5-√5)​

Answer 1

Answer:

20

Step-by-step explanation:

as we know the property that (a+b)(a-b) = a²-b²

so we apply this property

then we get,

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

=25-5

=20

hope it will help uhh

Answer 2

Answer:

as we know the formula (a+√b)(a-√b) = a²-b

(5+√5)(5-√5) = 5²-5

=25-5

= 20