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idontgetconicsections

Select all of the quadrants that the parabola whose equation is y=sqrt(x-4) occupies. I II III IV So the basic rules are x is always positive to the right so: x=ay^2 opens to the right x is always negative to the left; so x=-ay^2 opens to the left My problem is: I got rid of the radical by squaring, which gave me y^2 = x-4, then I subtracted x and y^2 from both sides to get -x=-y^2-4. Am I supposed to multiply all numbers by -1 to get rid of the negative numbers or do I just leave it like that?

  • one year ago
  • one year ago

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  1. idontgetconicsections
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    @amistre64

    • one year ago
  2. idontgetconicsections
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    |dw:1342621312995:dw|

    • one year ago
  3. mukushla
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    multiply by -1 u will have \( x=y^2+4 \) can u draw it?

    • one year ago
  4. idontgetconicsections
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    |dw:1342621412614:dw|

    • one year ago
  5. idontgetconicsections
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    Or is it only in quadrant 1?

    • one year ago
  6. mukushla
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    u should move it to right

    • one year ago
  7. idontgetconicsections
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    |dw:1342621507272:dw|

    • one year ago
  8. slaaibak
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    Well, the answer of a square root is nonnegative.. so definitely can't be 3 or 4

    • one year ago
  9. idontgetconicsections
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    Like that?

    • one year ago
  10. idontgetconicsections
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    Thanks

    • one year ago
  11. slaaibak
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    No it's not

    • one year ago
  12. idontgetconicsections
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    So it's I and IV

    • one year ago
  13. idontgetconicsections
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    Why?

    • one year ago
  14. idontgetconicsections
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    Why is it wrong slaaiback?

    • one year ago
  15. slaaibak
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    I just told you. "Well, the answer of a square root is nonnegative.. so definitely can't be 3 or 4"

    • one year ago
  16. idontgetconicsections
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    It's only I then?

    • one year ago
  17. slaaibak
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    |dw:1342621638765:dw|

    • one year ago
  18. slaaibak
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    Yes. Only 1

    • one year ago
  19. idontgetconicsections
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    Uhmm... why doesn't it look like a parabola?

    • one year ago
  20. slaaibak
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    because I freehanded the graph. Just to illustrate where it goes. You can make it parabola-like yourself

    • one year ago
  21. idontgetconicsections
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    Haha. Well, I have another question: Score: Select all of the quadrants that the parabola whose equation is y = x² - 4 occupies I chose all quadrants... is this correct or is it only 1 and 2 because it's nonnegative?

    • one year ago
  22. mukushla
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    sorry u must consider ristrictions for x ,y from \( y=\sqrt{x-4} \) u have y>=0 and x>=4

    • one year ago
  23. slaaibak
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    It's all of them. x^2 is nonnegative yes, but x^2 - 4 is not always nonnegative

    • one year ago
  24. idontgetconicsections
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    This is really confusing.. which quadrants does x = y² + 1 occupy? I chose 1 because it's nonnegtaive, but 1 is not negative? So... ?

    • one year ago
  25. idontgetconicsections
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    Oh wait, that's a square root, so it's quadrant 1 and 4??

    • one year ago
  26. myko
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    omg, it's 1 and 4. The quadrants where x is positive

    • one year ago
  27. slaaibak
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    ye 1 and four looks correct to me.

    • one year ago
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