Răspuns :
12/3√3=12√3/9 = 4√3/3 .
21/√14 = 21√14/14 = 3√14/2 .
-28/4√7=-7/√7=-7√7/7=-√7 .
√2/√3=√6/3
√6/2√2=√12/4= 2√3/4=√3/2 .
5√3/4√5=5√15/20 = √15/4 .
21/√14 = 21√14/14 = 3√14/2 .
-28/4√7=-7/√7=-7√7/7=-√7 .
√2/√3=√6/3
√6/2√2=√12/4= 2√3/4=√3/2 .
5√3/4√5=5√15/20 = √15/4 .
a) 12/3√3= 4/√3= 4√3/3
b)21/√14= 21√14/14= 3√14/2
c)-28/4√7= -7/√7= -7√7/7= -√7
d)√2/√3= √6/3
e)√6/2√2= √12/2*2= 2√3/2*2= √3/2
f)5√3/4√5= 5√15/4*5= √15/4
b)21/√14= 21√14/14= 3√14/2
c)-28/4√7= -7/√7= -7√7/7= -√7
d)√2/√3= √6/3
e)√6/2√2= √12/2*2= 2√3/2*2= √3/2
f)5√3/4√5= 5√15/4*5= √15/4