a) √200 / √40=√5
b) 28 √8 / (-2√2)= 56√2/ (-2√2)=-28
c)3√24/2√6 =6√6/2√6 = 3
d) 7√5 / (-7√5) = -1
e)-3 √11 / (-√11) = 3
f)0,5√5 / (-√5) = -0,5
g)4 /5√10 / 5 / 4√5 = 4/5√10 * √5/4= √5/5√10= 1/5√2=√2/10
h)0,3√20/0,(6)√5 = 0,6√5 / 2√5/3 = 1,8√5/2√5=0,9
i) 5/9√80/5/3√5 = 5/36√5 x 3√5/5 = 1/12