SOLUTION: Use complete sentences to explain how you would use graphing technology to find the solutions of 0 = −x2 + 2.5x + 1. What do the solutions of 0 = −x2 + 2.5x + 1 represe

Algebra ->  Quadratic Equations and Parabolas -> SOLUTION: Use complete sentences to explain how you would use graphing technology to find the solutions of 0 = −x2 + 2.5x + 1. What do the solutions of 0 = −x2 + 2.5x + 1 represe      Log On


   

Question 625458: Use complete sentences to explain how you would use graphing technology to find the solutions of 0 = −x2 + 2.5x + 1. What do the solutions of 0 = −x2 + 2.5x + 1 represent on the graph of the equation?
Answer by jsmallt9(3758) About Me  (Show Source):
You can put this solution on YOUR website!
  1. Enter the equation
    y+=+-x%5E2%2B2.5x+%2B+1
    into the graphing calculator.
  2. Look at the graph.
  3. The x-intercepts of any graph are where the graph crosses/touches the x-axis.
  4. The y-coordinate of every point on the x-axis is zero!
  5. Since the equation we started with had a zero in the position for y, we are interested in these x-intercepts.
  6. Use the trace function on the graphing calculator to trace along the curve until you reach an x-intercept. This will be a solution to your equation.
    7. Repeat the trace to find the other x-intercept (which will be the other solution to your equation.