Question

Which is the correct graph of f(x) = x^3 – 10x^2 + 9x ?

Answer 1

@mathmath333

Answer 2

@cwrw238

Answer 3

\(\large \begin{align} \color{black}{
\normalsize \text{so your equation is } \hspace{.33em}\\~\\
f(x) = x^3 – 10x^2 + 9x \hspace{.33em}\\~\\
y= x^3 – 10x^2 + 9x \hspace{.33em}\\~\\
y = x(x^2 – 10x + 9) \hspace{.33em}\\~\\
\normalsize \text{so it cant be option e.) as it doesnt pass from (0,0)} \hspace{.33em}\\~\\

}\end{align}\)

Answer 4

Option A.

Answer 5

i m saying to check it,i m not saying answer is that option

Answer 6

\(\large \begin{align} \color{black}{
\normalsize \text{when y=0,x=2 } \hspace{.33em}\\~\\

y = x(x^2 – 10x + 9) \hspace{.33em}\\~\\
0=2(2^2 – 10\times 2 + 9) \hspace{.33em}\\~\\
0=2(4 – 20 + 9) \hspace{.33em}\\~\\
0=2(4 – 20 + 9) \hspace{.33em}\\~\\
0=2(-16 + 9) \hspace{.33em}\\~\\
0=2(-7) \hspace{.33em}\\~\\
0\neq -14\\
\normalsize \text{so that graph is also wrong} \hspace{.33em}\\~\\
}\end{align}\)