3x²-4x-4
D=(-4)²-4*3*(-4)=16+48=64
x1= (4-√64) /2*3 = (4-8) /6 = -4/6=-2/3
x2 = (4+√64) /2*3 = (4+8) /6 =12/6=2
3x² -4x-4 = (x-2)(x+2/3) = -(x+2/3)
2-x 2-x
