SOLUTION: Use a graphing utility to graph the quadratic function. Find the x-intercepts of the graph and compare them with the solutions of the corresponding quadratic equation when y=0. y

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: Use a graphing utility to graph the quadratic function. Find the x-intercepts of the graph and compare them with the solutions of the corresponding quadratic equation when y=0. y      Log On


   

Question 618531: Use a graphing utility to graph the quadratic function. Find the x-intercepts of the graph and compare them with the solutions of the corresponding quadratic equation when y=0.
y=x^2-9x+18
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Use a graphing utility to graph the quadratic function. Find the x-intercepts of the graph and compare them with the solutions of the corresponding quadratic equation when y=0.
y=x^2-9x+18
graph%28400%2C400%2C-10%2C10%2C-10%2C10%2Cx%5E2-9x%2B18%29
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y = x^2-9x+18
x = [9 +- sqrt(81-4*18)]/2
x = [9 +- sqrt(9)]/2
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x = (9+3)/2 = 6
x = (9-3)/2 = 3
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Cheers,
Stan H.
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