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Lilmike234

  • one year ago

Do the point (3,0) lie on the graph of P(x)=x^3-7x^2+15x-9 ?

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  1. Vocaloid
    • one year ago
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    let x = 3 and evaluate P(x)=x^3-7x^2+15x-9

  2. lilmike234
    • one year ago
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    I came up with -18 so it doesn't lie on this graph ?

  3. Vocaloid
    • one year ago
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    hm, check your math one more time

  4. Vocaloid
    • one year ago
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    3^3 = 27 7(3)^2 = 63 15(3) = 45 27-63+45-9 = ?

  5. lilmike234
    • one year ago
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    ooo so I would get 0 ?

  6. Vocaloid
    • one year ago
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    yes

  7. lilmike234
    • one year ago
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    So (3,0) doesn't lie on the graph ?

  8. Vocaloid
    • one year ago
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    think carefully (3,0) means that P = 0 when x = 3, so (3,0) lies on the graph

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