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Math Help - Graphing advise please

  1. #1
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    Graphing advise please

    Hi,

    Can someone show me how to answer the following graphically

    H3 + 87.48h - 305.73 = 0

    Solving for h

    Thanks....mark
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  2. #2
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    Quote Originally Posted by manich44 View Post
    Hi,

    Can someone show me how to answer the following graphically

    H3 + 87.48h - 305.73 = 0

    Solving for h

    Thanks....mark
    1. I assume that you mean

    H^3+87.48H-305.73=0

    2. I assume that you are asked to solve this equation graphically(?).

    3. If so: Draw the graph of the function

    y = x^3+87.48x-305.73

    and determine the coordinates of the x-intercept. The x-coordinate is the solution of the given equation. (The y-coordinate of the x-intercept must be zero!)

    4. For confirmation only: My TI-84 has an output of x = 3.1407146
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  3. #3
    A riddle wrapped in an enigma
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    Quote Originally Posted by manich44 View Post
    Hi,

    Can someone show me how to answer the following graphically

    H3 + 87.48h - 305.73 = 0

    Solving for h

    Thanks....mark
    Hi manich44,

    You might try the Cubic Formula. I cheated and used a graphing calculator.

    Only 1 real zero at 3.1407146
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  4. #4
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    Quote Originally Posted by earboth View Post
    1. I assume that you mean

    H^3+87.48H-305.73=0

    2. I assume that you are asked to solve this equation graphically(?).

    3. If so: Draw the graph of the function

    y = x^3+87.48x-305.73

    and determine the coordinates of the x-intercept. The x-coordinate is the solution of the given equation. (The y-coordinate of the x-intercept must be zero!)

    4. For confirmation only: My TI-84 has an output of x = 3.1407146
    How do I enter that into a graphing calculator.Can you show me an example.

    Thanks
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  5. #5
    A riddle wrapped in an enigma
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    Quote Originally Posted by manich44 View Post
    How do I enter that into a graphing calculator.Can you show me an example.

    Thanks
    What kind of graphing calculator do you have?
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