Răspunsuri

2014-03-13T21:10:25+02:00
3(x+1/2)²+1/4=19
3(x+1/2)²=19-1/4
(x+1/2)²=(19-1/4)/3
x+1/2=radical din (19-1/4)/3
x= (radical din (19-1/4)/3 ) -1/2
x=(radical din 6.25)-1/2
x=2.5-0.5
x=2