Question

(sqrt 5 + 2 sqrt 3)( sqrt 5 - 4 sqrt 12) <--- must be in simplest radical form , show work please

Answer 1

(sqrt 5 + 2 sqrt 3)( sqrt 5 - 4 sqrt 12)

sqrt{5}sqrt{5} = 5
sqrt{5}-4sqrt{12} = -8sqrt{15}
2sqrt{3}sqrt{5} = 2sqrt{15}
2sqrt{3}(-4sqrt{12}) = -48

-43-6 sqrt(15)

Answer 2

thanks