Question

Помогите!!!!!!!!!!!!!!!!??????????

Answer 1

1) $2 sqrt{a} -6 sqrt{a} =4 sqrt{a}$
2)$sqrt{8a} + sqrt{18a} = sqrt{4*2a} + sqrt{9*2a} =2 sqrt{2a} +3 sqrt{2a} =5 sqrt{2a}$
3)$sqrt{6} ( sqrt{24} - sqrt{54} )=sqrt{6} ( sqrt{4*6} - sqrt{9*6} )=sqrt{6} ( 2sqrt{6} - 3sqrt{6} )=- sqrt{6} * sqrt{6}=-6$
=-6
4)$3 sqrt{12} +2 sqrt{3} -2 sqrt{27} =3 sqrt{4*3} +2 sqrt{3} -2 sqrt{9*3} =6 sqrt{3} +2 sqrt{3} -6 sqrt{3} =2 sqrt{3}$

=$2 sqrt{3}$
вот

Answer 2

невиднл