Răspunsuri

Cel mai inteligent răspuns!
2014-10-16T22:24:09+03:00
15/2√18=(15·2√18)/(2√18·2√18)=30√18/4·18=(30·3√2)/72=90√2/70 =9√2/7
20/7√300=(20·7√300)/(7√300·7√300)=140√300/49·300=(140·10√3)/49·300 simplif=
=14√3/49·3=14/√3/147 simplif cu 7=2√3/21
acum fac direct
18/5√72=(18·5√72)/25·72=simplif=√72/20=6√2/20=3√2/10
√10/3√5=(√10·3√5)/9·5=simplif=√50/15=5√2/15=√2/3
2√21/3√14=(2√21·3√14)/9·14=simplif=√294/21=7√6/21=√6/3
3/√3=3√3/3=√3
-5√6/2√5=(-1)(5·2√6√5)/4·5=-√30/2
7√6/3√14=(7√6·3√14)/9·14=√84/6=4√21/6=2√21/3
2 5 2