Question

If `f(z) = -4z-9`, what is `-f(z)`?

Answer 1

See a solution process below:

Explanation:

To find `-f(z)` we need to multiply both sides of the function by `color(red)(-1)` to find the solution while keeping the function balanced:

`color(red)(-1) xx f(z) = color(red)(-1)(-4z - 9)`

`-f(z) = (color(red)(-1) xx -4z) + (color(red)(-1) xx -9)`

`-f(z) = 4z + 9`