Question

y=x^2-7x-8

Answer 1

What do you need to do?

Answer 2

This is a quadratic equation.

To find the zeros (in other words where the graph intersects the x-axis.
\(\normalsize\color{blue}{ y=x^2-7x-8\LARGE\color{white}{ \rm │ }}\) set y=0,
\(\normalsize\color{blue}{ 0=x^2-7x-8\LARGE\color{white}{ \rm │ }}\) factoring,
\(\normalsize\color{blue}{ 0=(x+1)(x-8)\LARGE\color{white}{ \rm │ }}\) Then you get,
\(\normalsize\color{blue}{ x=-1,~~8\LARGE\color{white}{ \rm │ }}\)

Answer 3

This is an quadratic equation, but we are not sure what we need to do with it. It can be solving the equation as you have illustrated, or just graph it. Unless the asker gives us more information, how are we supposed to help?

Answer 4

True :)