Answer:
[tex]f( - 1) = - 2[/tex]
Step-by-step explanation:
[tex]f(x) = - {x}^{2} + x \\ f( - 1) = - {( - 1)}^{2} + ( - 1) \\ = - (1) + ( - 1) \\ = - 1 - 1 \\ f( - 1)= - 2[/tex]
I hope I helped you^_^
