Question

Expand and simplify (√3+√15)² Give the answer in the form a+b√3 where a and b are integers. Any help?

Answer 1

The answer `18+6sqrt5`

Explanation:

Baby the solution is `a+bsqrt5` not `a+bsqrt3`

`(sqrt3+sqrt15)^2=(3+2*sqrt3*sqrt15+15)=18+2sqrt45`

`18+2sqrt(9*5)=18+6sqrt5`