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mitchelsewbaran

  • 3 years ago

Write the quadratic function in vertex form. y = x^2 + 8x + 18

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  1. ParthKohli
    • 3 years ago
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    Do you know how to complete the square?

  2. mitchelsewbaran
    • 3 years ago
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    (b/2)^2

  3. ParthKohli
    • 3 years ago
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    Yes, so can you apply that here? I'm sure you can...

  4. mitchelsewbaran
    • 3 years ago
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    here are the choices: y = (x - 4)^2 - 2 y = (x - 4)^2 + 2 y = (x + 4)^2 - 2 y = (x + 4)^2 + 2

  5. ParthKohli
    • 3 years ago
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    Okay, but can you add \(\left(b\over 2\right)^2\) to both sides? Do you know what \(b\) is?

  6. mitchelsewbaran
    • 3 years ago
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    8

  7. ParthKohli
    • 3 years ago
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    So what would \(\left(b\over 2\right)^2\) be?

  8. mitchelsewbaran
    • 3 years ago
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    16?

  9. ParthKohli
    • 3 years ago
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    Yes, so add \(16\) to both sides. :-)

  10. mitchelsewbaran
    • 3 years ago
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    y = (x + 4)^2 - 2

  11. ParthKohli
    • 3 years ago
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    Please show your work.

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