ANSWER:
[tex]D(-1)=2[/tex]STEP-BY-STEP EXPLANATION:
We have the following equation:
[tex]D\mleft(x\mright)=x^2-2x-1[/tex]We calculate the value of the function when the value of x is equal to -1, we replace:
[tex]\begin{gathered} D(-1)=(-1)^2-2\cdot(-1)-1 \\ D(-1)=1+2-1 \\ D(-1)=2 \end{gathered}[/tex]