Question

If f(x) = 4x² + +5 then, f(-2)

Answer 1

Explanation:

equation is given as

`fx=4x^(2) +5` if
`fx` is
`f(-2)` then we knew the vale of x which is
`-2\\` so we will substitute it in the equation as:

`f(-2) = 4(-2)^(2) +5`

solve:

`-2f=4(4)+5\\-2f=16+5\\-2f=21\\(-2f)/(-2) =(21)/(-2)`

`f=(21)/(-2)`

`f=-10.5`