Question

Answer 1

\(\left\{{}\begin{matrix}c=-1\\-\dfrac{b}{2a}=1\\f\left(1\right)=a+b+c=-3\end{matrix}\right.\) \(\Leftrightarrow\left\{{}\begin{matrix}c=-1\\b=-2a\\a+\left(-2a\right)+\left(-1\right)=-3\end{matrix}\right.\)

\(\Rightarrow\left\{{}\begin{matrix}a=2\\b=-4\\c=-1\end{matrix}\right.\) \(\Rightarrow y=2x^2-4x-1\)

\(\Rightarrow y\left(3\right)=5\Rightarrow m=5\)