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Home > A2C > Chapter 9 > Lesson 9.3.1 > Problem 9-121

9-121.

Carlos is always playing games with his graphing calculator, but now his calculator has contracted a virus. The ,   and functions on his calculator are not working. He needs to solve , so he graphs and sees the graph below in the standard window.

  1. From the graph, what appears to be an integer solution to the equation?

  2. Check your answer from part (a) in the equation.

  3. Since is a solution to the equation, what is the factor associated with this solution?

  4. Use polynomial division to find the other factor.

    Divide by using a generic rectangle.

  5. Use your new factor to complete this equation:

  6. The “other factor” leads to two other solutions to the equation. Find these two new solutions and give all three solutions to the original equation. 

    Try using the quadratic formula.