Răspunsuri

2014-10-21T20:56:45+03:00
Formula a²-b²=(a-b)(a+b)
(√2-1-1+√2)(√2-1+1-√2)=2(√2-1).0=0
2014-10-21T20:59:43+03:00
Pai folosesti formula binomului :(a-b)²=a²-2ab+b² si vei avea:
(2-2√2+1)-(1-2√2+2)=
2-2√2+1-1+2√2-2=0
sper ca te-am ajutat :D