find the equation of the normal line to the given curve at the specified point

Find the equation of the normal line to the given curve at the specified point. (Hint: The normal line is perpendicular to the tangent line. If you recall from algebra, two lines are perpendicular if their slopes are negative reciprocals.) y = (x4 - 1) x; (1, 0) Note: The result should be an equation, be sure to include y = in your