Question

F(x)=-x^2-x,find f(-9)

Answer 1

`\sf f(-9) =\boxed{-72}`

Explanation:

in order to find f(-9),

we can substitute x = -9 into the function f(x) = -x^2-x.

This gives us:

`\sf f(-9) = -(-9)^2 - (-9) = -81 + 9 = \boxed{-72}`

Therefore,

`\sf f(-9) =\boxed{-72}`
`\sf f(-9) =\boxed{-72}`