Question

F(x)= -x^2 -4x - 19Find f(-9)

Answer 1

`f(-9)=-64`

Step-by-step explanation

`f(x)=-(x^2)-4x-19`

Step 1

F(-9)

replace the value of x

`\begin{gathered} f(x)=-(x^2)-4x-19 \\ f(-9)=-((-9)^2)-(4\cdot-9)-19 \\ f(-9)=-(81)-(-36)-19 \\ f(-9)=-81+36-19 \\ f(-9)=-81+36-19 \\ f(-9)=-64 \end{gathered}`

I hope this helps you