Răspunsuri

2014-09-11T22:08:53+03:00
(3+2√2)* (3-2√2)= 9-√8

(a-b)(a+b)=a²-b²
1 5 1
2014-09-12T00:07:14+03:00
Se foloseste formula diferentei de patrate a²-b²=(a-b)(a+b)

 (3+2√2) · (3-2√2)= 3²-2√2²
=9-8
=1