Define:[br][br]f(x) := (x + 3)(x - 1)^2(x - 4)[br][br][br]Solve:[br][br]Solve[$1 < 0, x]
Where does the function graph cross the x-axis vs. touch it?[br]Why is the solution open at x = 1?
[br][b]Check the Signs near interesting values[br][br][/b]Substitute[f(x), x = -4][br][br]Substitute[f(x), x = 0][br][br]Substitute[f(x), x = 1][br][br]Substitute[f(x), x = 5]