Question

solve (5+√5) (5-√5)
please give correct answer​

Answer 1

Answer: (5+√5)(5-√5)

we know that (a+b)(a-b)=a²-b²

here, in this case a=5 and b=√5

→(5)²-(√5)²

=25-5

=20

Answer 2

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

As we know that :

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

Now, from the formula we get :

${(5)}^{2} - {( \sqrt{5}) }^{2} \\ \\ = > 25 - 5 = 20$

Hope it helps ☺