Question

(5 + root 5)( 5 minus root 5) as simplification gives a 20. b 2 root 5. c10. d25​

Answer 1

answer

(5+√5)(5-√5)

a squared - b squared gives (a+b)(a-b)

5^2 - √5^2

25-5=20

so the answer is (a) 20

Answer 2

Answer:

option a is correct that is 20.

Step-by-step explanation:

$(5 + \sqrt{5} )(5 - \sqrt{5} ) \\ = {5}^{2} - ({ \sqrt{5}) }^{2} \\ = 25 - 5 \\ = 20 \\ option \: a \: is \: correct \: that \: is \: 20$

I HOPE IT HELP YOU