Question

(3√3 +√5) (3√3 -√5)​

Answer 1

22

Explanation:

The product of a sum and difference is the difference of squares:

a^2 -b^2 = (a +b)(a -b)

Here, we have ...

a = 3√3

b = √5

so the product is ...

(3√3)^2 -(√5)^ = 27 -5 = 22

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