The value of (5+√5)(5-√5)

1.	The value of (5+√5)(5-√5)
Answer» By using identity (a+b)(a-b)=a sauare minus b square.Answer is 25-5=20 20 By using the identity (a+b)(a-b)which is equal to a^2-b^2 gives the answer 25-5=20 20

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