Respostas

2014-03-26T19:49:50-03:00
A) √20 = √2^2.5 = 2√5
b) 
√72 = √2.2^2.3^2 = 2.3√2 = 6√2
c) 
√96 = √2^4.2.3 = 2^2 √2.3 = 4√2.3

2014-03-26T20:11:57-03:00
Decomponha o radicando e simplifique:
a) √20= √ 2². 5  ⇒ 2√5
b)√72=√2.2².3² ⇒2.3√2 ⇒ 6√2
c)√96=√2².2².3 ⇒2.2√3⇒ 4√3