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Solved Examples
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ff  Use the graph to find the solution of - 2x2 + 8 = 0.  ff View Solution
ff  Estimate the solution of the equation 5x2 = 20 using a graph.
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ff  Find the solutions of the quadratic equation x2 - 2x - 3 = 0 using the graph.
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ff  Solve the quadratic equation - 4x2 - 4x + 8 = 0 using the graph.  ff View Solution
ff  Find the solution of 2x2 - 8 = 0 using the graph.  ff View Solution
ff  Solve by graphing the related function of the equation - 3x2 = - 27.  ff View Solution
ff  Solve by graphing the related function of the equation - x2 + 9x - 20 = 0.
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ff  Solve by graphing the related function of the equation - x2 - 2x + 3 = 0.  ff View Solution
ff  Solve by graphing the related function of the equation 5x2 + 7 = 52.  ff View Solution
ff  Solve the equation - x2 + 4 = 0 using the graph.
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ff  Use the graph to estimate the roots of the equation x2 + x = 2.
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ff  Estimate the solution of x2 - x = 6 using the graph.
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ff  Find the roots of the quadratic equation x2 + 5 = 6 using the graph.  ff View Solution
ff  The graph of y = 3x2 - 9x is shown. Estimate the solution of 3x2 - 9x = 0 using the graph.
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ff  Estimate the solution of 2x2 - x = 3 using the graph.  ff View Solution
ff  Find the x-intercepts by graphing the related function of the equation - x2 - 4x = 3.
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ff  Find the x-intercepts by graphing the related function of the equation x2 + 3x - 4 = 0.
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ff  Find the roots by graphing the related function of the quadratic equation 14x2 - 12x - 2 = 0.  ff View Solution
ff  During summer, the cable connected between two poles sagged and formed a parabola modeled by a quadratic function y = 0.00001x2 + 0.9, where x is the horizontal distance from the middle of the cable(in feet) and y is the vertical distance from the vertex of parabola(in feet). The cable sagged to a maximum height of 1 ft. Calculate the distance between the poles.  ff View Solution
ff  Use the graph to find the distance between the vertices of y = ax2 + c and y = ax2.
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ff  The main suspension cable of a bridge forms a parabola that can be modeled by the quadratic function y = 0.0055x2 + 20 where x is the horizontal distance from the middle of the bridge(in feet) and y is the vertical distance from the road(in feet). The cable is connected to the towers at points that are 240 feet above the road. How far apart are the towers?  ff View Solution
ff  The graph of y = 12x2 - 2 is shown. Using the graph, estimate the solution of 12x2 - 2 = 0.  ff View Solution
ff  Which of the following equations has the roots shown in the graph?  ff View Solution
ff  The graph of y = - 3x2 + 9x is shown in the figure. Estimate the solution of - 3x2 + 9x = 0 using the graph.
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ff  The graph of y = 3x2 - 4x - 7 is shown. Estimate the solutions of 3x2 - 4x - 7 = 0 using the graph.  ff View Solution