Question

Решите,пожалуйста,срочно

Answer 1

3) $( sqrt{6} + sqrt{3} )* sqrt{12} -2 sqrt{6}* sqrt{3} =( sqrt{2*3}+ sqrt{3} ) * sqrt{12} -2 sqrt{6*3}= \ \ = sqrt{3} *( sqrt{2}+1 )* sqrt{2*6}- sqrt{3}*2* sqrt{6} = \ \ = sqrt{3} * sqrt{6} *( (sqrt{2}+1 )* sqrt{2} -2)= sqrt{3*3*2}*(2+ sqrt{2}-2 )= \ \ =3 sqrt{2}* sqrt{2} =3*2=6$