Question

помогите
3y-40+y^2=0

Answer 1

у²+3у-40=0

D=9+160=169=13²

y1=-3-13/2=-8

y2=-3+13/2=5

По Виету:

у1у2=-3

У1•у2=-40

У1=-8

У2=5

Answer 2

3y-40+y^2=0

х1+х2=-b/a x1+x2=-3

x1•x2=c/a x1•x2=-40

x1=5 x2=-8