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

1 Answer
Jun 14, 2016

Answer:

#= 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#