Răspuns:
(2x-1)(2x+3)/2x+2=2x-1/3
3(4x^2+6x-2x-3)=(2x-1)(2x+1)
12x^2+12x-9=4x^2-1
8x^2+12x-8=0
Delta=b^2-4ac=144+4*64=144+256=400
x1=-12+20/16=8/16=1/2
X2=-12-20/16=-32/16=-2
