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

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Answer 1 · 2016-02-18T01:27:35

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

$18x-x^2 <-81$

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

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

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

How do you solve graph 18x-x^2 ≤ 8118x-x^2 ≤ 81?