Question

Simplify. । (3+√3 ) (3-√3 ) *

Options

1. 10
2. 20
3. 6
4. 15​

Answer 1

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

= a^2 - b^2

a = 3

b = √3

(3+√3) (3-√3) = (3)^2 - (√3)^2

= 9 - 3

= 6

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