Ill do my best to draw it-- just a quick and dirty version of it. Quad means squared so we know that the quadratic equation must have a squared term or it isnt quadratic. Lets think a little bit about why that happened.
For the Quadratic Formula to work you must have your equation arranged in the form quadratic 0.
X has two values because it represents the two places where the parabola will cross the x axis like in the graph at the left. Factoring using the quadratic formula and completing the square. Begincases 2a 2 3a b 5 abc 6 endcases We can see that the values that we use the ones weve boxed in the illustration are always the. The sign on the coefficient a a of the quadratic function affects whether the graph opens up or down.