math-please help,need quickly
posted by anonymous .
solve the polynomial inequality and graph the solution set on a real num ber line. express the solution set in interval notation
please show work
Look for roots of
x^3+x^2+64x+64 = 0
among x = +or- 1,2,4,8 and 16
(That is called using the rational rooot theorem)
One of them is x= -1. Therefore (x+1) is a factor of the polynomial.
Now divide x^3+ x^2+ 64x+ 64 by x+1 for the other roots. Between the x values where f(x) = 0, the function is either + or -. You will have to figure that out.
If you can't, try reading
Given the statement below, translate to an inequality. Use the variable n.
The cost of repairs will be at most $240.