Răspunsuri

2014-05-12T15:21:24+03:00
[tex]3 x^{2} +2x+6x+4+ x^{2} -4x+4=2 x^{2} +x+2( x^{2} +2x+1)-6 4 x^{2} +4x+8=2 x^{2} +x+2 x^{2} +4x+2-6 4 x^{2} +4x+8=4 x^{2} +5x-4 
4x+8=5x-4
x=12