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iwanttogotostanford

  • one year ago

(x^2-4x+3)-(3x^2-4x-3) is equivalent to: 2x^2-6 2x^2-8x 2x^2-8x-6 -2x^2+6 -2x^2-8x

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  1. iwanttogotostanford
    • one year ago
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    @Vocaloid

  2. Vocaloid
    • one year ago
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    start by distributing the negative sign

  3. iwanttogotostanford
    • one year ago
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    how do i do that

  4. Vocaloid
    • one year ago
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    hint: -(A-B-C) = -A+B+C

  5. iwanttogotostanford
    • one year ago
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    oh ok gotcha

  6. Vocaloid
    • one year ago
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    -(3x^2-4x-3) = ?

  7. iwanttogotostanford
    • one year ago
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    (3x^2+-4x+-3)?

  8. Vocaloid
    • one year ago
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    almost, check your signs

  9. iwanttogotostanford
    • one year ago
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    oh, -3x^2+-4x+-3?

  10. Vocaloid
    • one year ago
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    getting closer

  11. Vocaloid
    • one year ago
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    -(-4x) = ? -(-3) = ?

  12. iwanttogotostanford
    • one year ago
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    4x and 3!

  13. Vocaloid
    • one year ago
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    right, so we have - 3x^2 + 4x + 3 on the right side after we distribute now we put the whole problem back together

  14. iwanttogotostanford
    • one year ago
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    yes

  15. Vocaloid
    • one year ago
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    x^2-4x+3- 3x^2 + 4x + 3 know where to go from here?

  16. iwanttogotostanford
    • one year ago
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    just combine right?

  17. Vocaloid
    • one year ago
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    yes, so what does that give us?

  18. iwanttogotostanford
    • one year ago
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    x^2+14-3x^2? Im really bad at combining like terms for some reason..

  19. iwanttogotostanford
    • one year ago
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    i most likely did it wrong

  20. Vocaloid
    • one year ago
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    not quite x^2 - 3x^2 = ?

  21. iwanttogotostanford
    • one year ago
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    3

  22. iwanttogotostanford
    • one year ago
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    so it would be x^+11?

  23. Vocaloid
    • one year ago
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    uh, not quite hint: 1 - 3 = -2 x - 3x = -2x x^2 - 3x^2 = ?

  24. iwanttogotostanford
    • one year ago
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    just -2?

  25. Vocaloid
    • one year ago
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    don't forget the x^2

  26. iwanttogotostanford
    • one year ago
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    -2^2???

  27. iwanttogotostanford
    • one year ago
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    im so bad at this one ...

  28. Vocaloid
    • one year ago
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    nope, when you combine like terms, you keep the variable x^2 - 3x^2 = -2x^2

  29. iwanttogotostanford
    • one year ago
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    plus 6 right?

  30. Vocaloid
    • one year ago
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    right

  31. Vocaloid
    • one year ago
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    think of it this way: 1 - 3 = -2 1 dollar - 3 dollars = -2 dollars the "dollar" stays in the answer, just like x^2 stays in the answer

  32. Vocaloid
    • one year ago
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    so our final answer is -2x^2 + 6

  33. iwanttogotostanford
    • one year ago
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    ok, im gonna need to practice that one a bit. thanks for all of you help! is it ok if i tag you in a couple of questions tomorrow?

  34. Vocaloid
    • one year ago
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    sure, I'm online all day tomorrow

  35. iwanttogotostanford
    • one year ago
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    ok- thanks i will tag you !

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