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Solved Examples
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B   Use the graph to find the solution of - 2x2 + 8 = 0.   B View Solution
B   Find the solutions of the quadratic equation x2 - 2x - 3 = 0 using the graph.
   B
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B   Estimate the solution of the equation 5x2 = 20 using a graph.
   B
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B   Solve the quadratic equation - 4x2 - 4x + 8 = 0 using the graph.   B View Solution
B   Find the solution of 2x2 - 8 = 0 using the graph.   B View Solution
B   Solve by graphing the related function of the equation - 3x2 = - 27.   B View Solution
B   Solve by graphing the related function of the equation - x2 + 9x - 20 = 0.
   B
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B   Solve by graphing the related function of the equation - x2 - 2x + 3 = 0.   B View Solution
B   Solve by graphing the related function of the equation 5x2 + 7 = 52.   B View Solution
B   Solve the equation - x2 + 4 = 0 using the graph.
   B
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B   Use the graph to estimate the roots of the equation x2 + x = 2.
   B
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B   Estimate the solution of x2 - x = 6 using the graph.
   B
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B   Find the roots of the quadratic equation x2 + 5 = 6 using the graph.   B View Solution
B   The graph of y = 3x2 - 9x is shown. Estimate the solution of 3x2 - 9x = 0 using the graph.
   B
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B   Estimate the solution of 2x2 - x = 3 using the graph.   B View Solution
B   Find the x-intercepts by graphing the related function of the equation - x2 - 4x = 3.
   B
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B   Find the x-intercepts by graphing the related function of the equation x2 + 3x - 4 = 0.
   B
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B   Find the roots by graphing the related function of the quadratic equation 14x2 - 12x - 2 = 0.   B View Solution
B   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.   B View Solution
B   Use the graph to find the distance between the vertices of y = ax2 + c and y = ax2.
   B
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B   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?   B View Solution
B   The graph of y = 12x2 - 2 is shown. Using the graph, estimate the solution of 12x2 - 2 = 0.   B View Solution
B   Which of the following equations has the roots shown in the graph?   B View Solution
B   The graph of y = - 3x2 + 9x is shown in the figure. Estimate the solution of - 3x2 + 9x = 0 using the graph.
   B
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B   The graph of y = 3x2 - 4x - 7 is shown. Estimate the solutions of 3x2 - 4x - 7 = 0 using the graph.   B View Solution