Question

(5+√5)(5_√5) simplify the following​

Answer 1

for simplifying it we have used to identity a square minus b square

so 5^2-√5^2

25-5

=20 is answer

$....$

Answer 2

(5+√5) *(5-√5)

=5(5-√5)+√5(5-√5)

=25-5√5+5√5-5

=25-5

=20