Question

How do you simplify `(9 +sqrt3)^2`?

Answer 1

`= 84 + 18 sqrt3`

Explanation:

Squaring a bracket means multiply it by itself.

This is the square of a binomial because there are 2 terms in the brackets. The answer will be TRINOMIAL.

`(9 + sqrt3)^2 = (9 + sqrt3)(9 + sqrt3)`

`= 81 + 9sqrt3 + 9sqrt3 + sqrt3^2`

`81 + 18sqrt3 + 3`

`= 84 + 18 sqrt3`