Question

how do you simplify: 2 radical 50- 3 radical 8

Answer 1

let A = 2 radical 50- 3 radical 8 
 radical 50 = sqrt( 2* 25 ) = 5sqrt( 2 )
 radical 8  = sqrt(2*4) = 2 sqrt(2)
so 
A = 2 radical 50- 3 radical 8 = 10sqrt( 2 ) - 6sqrt( 2 ) = 4sqrt( 2 )
finally 

A = 4sqrt( 2 )