x^2+5x+2-2x=0
x^2+3x+2=0
D=9-8=1
x1=(-3+1)/2*1=-2/2=-1
x2=(-3-1)/2*1=-4/2=-2
<span>6x²-5x+1 = 0</span>
tg4x=tg( -pi/3)
4x=-pi/3
x=-П/12