Question 461456
1.what is the answer to 

{{{sqrt(2)(-6*sqrt(2)+4)}}}

={{{-6sqrt(2)*sqrt(2)+4*sqrt(2)}}}

={{{-6(sqrt(2))^2)+4*sqrt(2)}}}

={{{-6*2+4*sqrt(2)}}}

={{{-12+4*1.41}}}

={{{-12+5.64}}}

={{{-6.36}}}


2.what is the answer to 

{{{7sqrt(9x6y)*11}}}

={{{77sqrt(3^2*6y)}}}

={{{77*3sqrt(6y)}}}

={{{231*sqrt(6)sqrt(y)}}}


3.what is the answer to 

{{{(5sqrt(5)-10sqrt(3))(2sqrt(5)+4sqrt(3))}}}


={{{5sqrt(5)*2*5sqrt(5)+5sqrt(5)*4sqrt(3)-10sqrt(3)*2sqrt(5)-10sqrt(3)*4sqrt(3))}}}


={{{5*5*2*5+20sqrt(5)sqrt(3)-20sqrt(3)sqrt(5)-40*3}}}


={{{250+cross(20sqrt(5)sqrt(3))-cross(20sqrt(3)sqrt(5))-120}}}

={{{130}}}