Question

ind the value of (3+√5)(3−√5) .

Answer 1

Answer:

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Answer 2

Answer:

4

Step-by-step explanation:

Identity used- (a+b)(a-b)=(a)²-(b)²

Here, we should use the same identity.

Steps-

(3+√5)(3−√5)

(3²)-(√5)²

9-5 (because in (√5)², the square root and the square get cancelled)

4

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