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3psilon

Standard form for a parabola with this equation! Help please!

  • one year ago
  • one year ago

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  1. 3psilon
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    \[y = -\frac{ 1 }{ 4 }x^{2} -x + \frac{ 1 }{ 4 } \]

    • one year ago
  2. 3psilon
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    I don't get the completing the square part

    • one year ago
  3. Shadowys
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    drawing? can't see equation

    • one year ago
  4. hartnn
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    that equation is in standard form, u need to get it in vertex form ?

    • one year ago
  5. 3psilon
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    yes

    • one year ago
  6. hartnn
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    -1/4(x^2+4x)+1/4 what to add and subtract ?

    • one year ago
  7. 3psilon
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    subtract 1/4

    • one year ago
  8. hartnn
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    we add and subtract the square of half of co-efficient of x so here, what is half of 4 ?

    • one year ago
  9. 3psilon
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    2

    • one year ago
  10. hartnn
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    and its square ?

    • one year ago
  11. 3psilon
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    4

    • one year ago
  12. hartnn
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    so what will u add and subtract ?

    • one year ago
  13. 3psilon
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    Do you subtract the square?

    • one year ago
  14. hartnn
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    u add and subtract the 4 like this: -1/4(x^2+4x+4 -4)+1/4 can u go ahead ?

    • one year ago
  15. 3psilon
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    y-1/4 +4 = -1/4(x^2+4x -4)

    • one year ago
  16. hartnn
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    y-1/4 -4(1/4) = -1/4(x^2+4x +4)

    • one year ago
  17. 3psilon
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    why -4(1/4) on the left???

    • one year ago
  18. hartnn
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    y=-1/4(x^2+4x+4 -4)+1/4 = -1/4 (x^2+4x+4) -1/4 (-4) +1/4 y-1/4 -1/4(4) = -1/4(x^2+4x+4) confusing ?

    • one year ago
  19. 3psilon
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    why did you not add it to both sides? why subtract? it says -1/4(-4)

    • one year ago
  20. 3psilon
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    Ohh I see it now

    • one year ago
  21. 3psilon
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    Wow thank you so much

    • one year ago
  22. hartnn
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    u can continue to get the vertex form, right ?

    • one year ago
  23. 3psilon
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    yess It is quite easy now. Thank you so much :) I can sleep now haha

    • one year ago
  24. hartnn
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    welcome ^_^

    • one year ago
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