Answer:
[tex]y=-x^2+4x+9[/tex]
Step-by-step explanation:
The quadratic function, [tex]y=9-x^2+4x[/tex] is a polynomial of degree 2.
To write a polynomial function in [tex]x[/tex] in standard form, means writing it in decreasing powers of [tex]x[/tex].
The quadratic function in standard form is
[tex]y=-x^2+4x+9[/tex]
