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katlin95

  • 4 years ago

Solve the equation by graphing: x^2 – 18x + 81 = 0. A. {-2, 9} B. {9/2, 3} C. {9} D. No solution

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  1. amistre64
    • 4 years ago
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    since you have options, why not just plug and play?

  2. amistre64
    • 4 years ago
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    1 -18 81 0 -2 1 -20... -2 not a zero

  3. MrYantho
    • 4 years ago
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    If you have to graph, I would convert the equation into vertex form.

  4. amistre64
    • 4 years ago
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    1 -18 81 0 9 -81 1 -9 .... 9 IS a zero

  5. amistre64
    • 4 years ago
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    and; 18/2 = 9, ^2 = 81 so its a perfect square already

  6. amistre64
    • 4 years ago
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    id go 9 :)

  7. MrYantho
    • 4 years ago
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    If you are asked to graph - then you need to know how to graph. Do you understand how to graph the equation?

  8. katlin95
    • 4 years ago
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    ya the answer is 9 guys

  9. EEMajor12
    • 4 years ago
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    Make a T-chart |dw:1327882261999:dw| keep on going till you get a y value of 9. You will notice the trend of lowering y values.

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