Question

Can anyone help me solve this?
( ) = radical

5(8) + 2(20) - (8)

Answer 1

ok first you have to simplify the radicals, for example (8) is going to be (4*2), since 4 is a square, you can put 2( the aquare root of 4) outside the radical and 2 inside the radical as well
multiply the outside 2 with 5, and you get 10(2)

Answer 2

sqrt ( 40+40-8) = sqrt(72) = sqrt(8*9) = sqrt(4*2*9) = 3*2sqrt(2) = 6sqrt2