Question

Restrangeti dupa ce ati calculat ! : P
a) √8+√18-√32=
b)√45+√20-√125=
c)2√160-3√90+5√40=
d)√27+√243+√75-√108=
e)√72-√98+√127=
Ma poate ajuta cineva ca nu inteleg ;-;m

Answer 1

a) √8+√18-√32=
=2√2+3√2-4√2=
=5√2-4√2=√2

 b)√45+√20-√125=
=3√5+2√5-5√5=
=5√5-5√5=0


c)2√160-3√90+5√40=
=8√10-9√10+10√10=
=8√10+√10=
=9√10

 d)√27+√243+√75-√108=
=3√3+9√3+5√3-6√3=
=17√3-6√3=
=11√3

 e)√72-√98+√127=
=6√2-7√2+√127=                        127 e nr prim -probabil ai gresit ceva...
=-√2+√127