Question

How do you solve graph `18x-x^2 ≤ 81`?

Answer 1

This inequality is true for all Real values of `x`
(Shade the entire graph area as part of the solution).

Explanation:

`18x-x^2 <-81`

`rarr 0<= (x^2-18x+81)`

`rarr 0 <= (x-9)^2`

Since all Real values when squared are `>=0` this is true for all Real values.