Question

simplify :(3+√5) (3-√5)​

Answer 1

Answer:

(3+√5) (3-√5). (a+b)(a-b)=a²-b²

= 3²-√5²

9-5=4

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Answer 2

Step-by-step explanation:

by using identity:

(a+b)(a-b) =a²-b²

(3+√5)(3-√5)=3²-(√5)²=9-5=4