+14905 Hallo Gast!
vertex of f(x)= -0.06x²+2.7x+5.2
\({\color{red} f(x)= -0.06x²+2.7x+5.2}\)
\({\color{blue}f'(x)=y= -0.12x + 2.7=0}\)
\({\color{blue}x=}\frac{-2.7}{-0.12}={\color{blue}22.5}\)
\( {\color{blue}f(x)=} -0.06\times{}22.5^2+2.7\times22.5+5.2={\color{blue}35.575}\)
Scheitelpunkt der Parabel: S (22.5 / 35.575)
Gute Nacht wünscht
asinus :- ) 
!
