a = -1
b = -1
c = 4
Explanation:The general form of a quadratic expression is:
[tex]ax^2+bx+c[/tex]The given quadratic expression is:
[tex]4-x^2-x[/tex]This may be written as:
[tex]-x^2-x+4[/tex]Comparing this to the general expression, we see that
[tex]\begin{gathered} a=-1 \\ b=-1 \\ c=4 \end{gathered}[/tex]