Find the solutions (roots) of a quadratic equation using the graphing calculator. Consider the following examples: Solve: Since this equation is set equal to zero, the roots will be the locations where the graph crosses the x-axis (if the roots are real numbers). (Remember that the x-axis is really just y = 0.) 1. Set. 2. Use the ZERO command to find the roots -- 2nd TRACE (CALC), #2 zero.
The cost of glasses and how to save. Glasses can cost anywhere between $10 for reading glasses at Walmart to $500+ if you opt for an expensive designer pair. Asking how much glasses cost is a little like asking how much your wife should spend on a new dress. It depends on whether she's shopping at Kohl's or Neimen Marcus, Target or Anthropologie!
When I had problems with my sunglasses at Walmart the opticians had no idea what I was talking about but at my eye doctor the opticians are experts. If you want cheap you can order glasses from overseas. I've had fewer problems with glasses I ordered from Zenni Optical than the ones I got from Walmart.