Quickk experts/ace or anyone who wants to

The $x$-intercepts of the parabola $y = x^2 + bx + c$ are $(-3,0)$ and $(5,0).$ find the equation of the parabola, and submit your answer in $y = ax^2 + bx + c$ form.

Find x & pleassse me !

Astudent simplified a rational expression as shown.