Question

(5+√5)(√5-√5) is
please answer this if you know ​

Answer 1

Answer:

(5+ root 5)(root 5 - 5)

gives you (5²-root5²)

which is equal to 25-5= 20

by using a²-b² formula

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Answer 2

Answer:

Correct question -

(5+√5)(5-√5)

Answer -

= 5²-(√5)²

= 25-5

= 20

Formula used -

(a+b)(a-b) = a²-b²