solve the inequality. (x+13)^2 (9-x) over (x+81)(x^2-81) is less than or equal to zero.?

Question

express the answer in tems of intervals, if possible. may need inf and cup symbols.

Answer 1

[(x+13)^2 (9-x)]/[(x+81)(x^2-81)] <= 0
-(x+13)^2/[(x+81)(x+9)] <= 0
(-infinity,-81) U [9, +infinity)