Question 628330
Solve the polynomial inequality and graph the solution set on a real number line. Express the solution set in interval notation. 
x^3-4x^2-16x+64<0
factor by grouping
x^2(x-4)-16(x-4)<0
(x-4)(x^2-16)<0
(x-4)(x+4)(x-4)<0
number line
<....-....-4.....+.....4....+.....>
solution: (-&#8734;,-4)