[tex]5x {}^{2} - 14x + 8 = 0[/tex]
[tex]a (x - x {}^{1} )(x - x {}^{2} )[/tex]

5x²-14x+8=0D=(-14)²-4*5*8=196-160=36x₁=(14+6)/2*5=20/10=2x₂=(14-6)/2*5=8/10=0,85x²-14x+8=5(x-2)(x-0,8)