(5√2-√18)√2 = ( 5√2- √ 2*9) √2 = (5√2 -3√2) √2= 2√2 * √2
10√3-4√48-√75 = 10√3 - 4√3*16 - √3*25 = 10√3 - 16√3- 5√3 = -11√3
1/2√5= 1/2√5 * 2√5/ 2√5 = 2√5/2.5
8/√7-1 = 8/√7-1 * √7+1/√7+1 = 8√7+1/7-1
(5√2-√18)√2 = ( 5√2- √ 2*9) √2 = (5√2 -3√2) √2= 2√2 * √2
10√3-4√48-√75 = 10√3 - 4√3*16 - √3*25 = 10√3 - 16√3- 5√3 = -11√3
1/2√5= 1/2√5 * 2√5/ 2√5 = 2√5/2.5
8/√7-1 = 8/√7-1 * √7+1/√7+1 = 8√7+1/7-1