cubic function
a>0
solution α<β<γ
x<α
f(x)<0
α<x<β
0<f(x)
β<x<γ
f(x)<0
γ<x
0<f(x)
a<0
solution α<β<γ
x<α
f(x)>0
α<x<β
0>f(x)
β<x<γ
f(x)>0
γ<x
0>f(x)
T.theodor 2022.7.25
cubic function
a>0
solution α<β<γ
x<α
f(x)<0
α<x<β
0<f(x)
β<x<γ
f(x)<0
γ<x
0<f(x)
a<0
solution α<β<γ
x<α
f(x)>0
α<x<β
0>f(x)
β<x<γ
f(x)>0
γ<x
0>f(x)
T.theodor 2022.7.25