Question

Simplify

Answer 1

@Michele_Laino

Answer 2

here you have to multiply both numerator and denominator by sqrt(a)-3, namely:
\[\frac{b}{{\sqrt 3 + a}} \times \frac{{\sqrt 3 - a}}{{\sqrt 3 - a}} = ...?\]

Answer 3

oops... by sqrt(3)-a

Answer 4

hint:
\[\left( {\sqrt 3 + a} \right)\left( {\sqrt 3 - a} \right) = {\left( {\sqrt 3 } \right)^2} - {a^2} = ...?\]

Answer 5

got the answer

Answer 6

https://mathway.com/