(a) Use a graphing utility to graph the two equations in the same viewing window,
(b) use the graphs to verify that the expressions are equivalent, and
(c) use long division to verify the results algebraically.
1. y1 = x2 + 2x - 1/x + 3 , y2 = x - 1 + 2/x + 3
2. y1 = x4 + x2 - 1/x2 + 1, y2 = x2 - 1/x2 + 1