👤

a=3rad7-5rad2= ajutati-ma va rog


Răspuns :

A = 3√7 - 5√2 =
A= √9·7 - √25·2
A= √63 - √50
A= √13
 [tex]3\sqrt7-5\sqrt2= 3\sqrt7-5\sqrt2\;;\\
daca\;se\;cere\;o\;valoare\;aproximativa\,,\;\\
atunci...\sqrt7\approx2,64\;si\;\sqrt2\approx1,41\;;\\
\Rightarrow\;\;A=3\cdot2,64\,-\,5\cdot1,41=7,92-7,05\,\approx\,0,87[/tex]