1: y = x3 + x2 - 4x - 4 y = (x + 2)(x - 2)(x + 1) x intercepts are (-2, 0), (2, 0), (-1. 0) y intercept (0, -4) Remember that the max/min values of the loops aren't determined; yours may differ 
2: y = -8x3 - 34x2 - 7x + 4 y = -1(x + 4)(2x + 1)(4x - 1) x intercepts are (-4, 0), (-0.5, 0), (0.25, 0) y intercept (0, 4) The left downward loop is way off the grid we used, but it's value doesn't have to be determined. |