Using Melody's answer as a guide, the function has a max at (-1, 3)
And since the end behavior of the function as it approaches infinity is negative.......it has to have at least one negative root, because it would have to cross the x axis once as it approaches x = -1 from the left side
The y intercept is positive......and we have a min at (1, -1)......so the function has to cross the x axis once between x = 0 and x = 1
Likewise, the end behavior of the function is positive as is approchaes positive infinity......so....it must cross the x axis somewhere between x = 1 and infinity
Thus......the function has one negative root and two positive ones........
