[tex] \frac{1}{2} x {}^{2} - \frac{8}{100} x + 0,75 = 0 \\ \\ \boxed{\boxed{\boxed{a = \frac{1}{2} \: , \: b = - \frac{8}{100} \: ,\: c = 0,75}}} \\ [/tex]

atte. yrz