Question

find the value of (3 √2- 2 √3) (3 √2 + 2√3

Answer 1

Answer:

let

3√2 = a

2√3 = b

we want the value of (a-b) (a+b)

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

so, (3√2)^2 -(3√3)^2

=18-27 = -9

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