How do you solve quadratic equations? - Answers

there are different ways of doing this. it depends on what you must do. 1.) You need to find the roots. there are only 2. They are, simply, the X-intercepts, i.e. where they cross the X-Axis. 2.) You need to find the equation by some means. To do this, you need to have a set of points. Get them yourself or obtain a table. Use a graphing calculator and enter the points into what's called an edit. Hit the edit key and enter in your X values into L1 and Y values into L2. Go to 2nd Y= and turn on stat plot #1. Afterwards, turn on the quadratic regression (under Edit, then go right one slot to "Vars" and it's number 4 down, called QuadReg). It'll give you all the stats you need to know, and it's even nice enough to give you the equation formula. Finally, record these pertinent values and enter the equation into Y=. Go to table and tada! 3.) Or, you're unlucky and you have to graph the darn thing. This required all of the above. Just do #2 above and copy the points onto graph paper. Hopefully you're good at connect the dots. Just make it look like a curve and connect all of the dots. Hope this was useful and good luck, from a fellow Algebra 1 student.