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anonymous

  • one year ago

Help with algebra 2 please

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  1. arindameducationusc
    • one year ago
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    hello

  2. phi
    • one year ago
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    f/g means divide f's expression by g's

  3. arindameducationusc
    • one year ago
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    divide f(x) by g(x) and take out the point in which g(x) is zero. so domain will be real numbers - of that point

  4. arindameducationusc
    • one year ago
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    @phi can i try this one? you can verify me if i am wrong

  5. anonymous
    • one year ago
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    @arindameducationusc hi

  6. anonymous
    • one year ago
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    okay so like -20x^2 + 14x + 12 / 5x - 6 That's what I thought it was initially, but not sure.

  7. phi
    • one year ago
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    it might be easier to multiply g(x) by the choice and see if you get f(x) or, you can try dividing g(x) into f(x) of course, you need to know how to divide polynomials by another polynomial

  8. arindameducationusc
    • one year ago
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    yes you are going the right way... just be careful with the domain.

  9. arindameducationusc
    • one year ago
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    @lily1021 do you know how to divide polynomials?

  10. phi
    • one year ago
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    if you learn anything in math, it is *no divide by zero* if there is an "x" value that makes the bottom zero , we do not allow x to be that number

  11. arindameducationusc
    • one year ago
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    @phi you are right

  12. arindameducationusc
    • one year ago
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    yes @phi if g(x) is zero then it wont be defined

  13. skullpatrol
    • one year ago
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    But, do you know why you can never divide by 0 @lily1021 ?

  14. anonymous
    • one year ago
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    because you can't find an answer

  15. anonymous
    • one year ago
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    i've divided polynomials before but i'm usually a hit or miss with them

  16. skullpatrol
    • one year ago
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    Yes, that makes it "undefined."

  17. anonymous
    • one year ago
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    right

  18. skullpatrol
    • one year ago
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    Division by 0 has no meaning in the set of real numbers.

  19. anonymous
    • one year ago
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    so I'm not going to divide then? Idk my heads spinning

  20. skullpatrol
    • one year ago
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    Just like a word that has no meaning is undefined in the dictionary :-)

  21. skullpatrol
    • one year ago
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    Yes, first you divide one polynomial into the other.

  22. skullpatrol
    • one year ago
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    Second you set the divisor equal to 0 and find the values that make the divisor equal to 0 and exclude them in your answer.

  23. skullpatrol
    • one year ago
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    Does that procedure make sense @lily1021 ?

  24. skullpatrol
    • one year ago
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    |dw:1440074722497:dw|

  25. anonymous
    • one year ago
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    yes I have that down on my paper

  26. anonymous
    • one year ago
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    just like that too

  27. anonymous
    • one year ago
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    i'm getting 5x-6

  28. skullpatrol
    • one year ago
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    |dw:1440074924187:dw|

  29. anonymous
    • one year ago
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    okay I see that

  30. skullpatrol
    • one year ago
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    |dw:1440075267669:dw|

  31. anonymous
    • one year ago
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    yeah I was wondering if +12 was supposed to be there too. Yep

  32. skullpatrol
    • one year ago
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    What is the second thing we need to do now?

  33. anonymous
    • one year ago
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    set the divisor?

  34. skullpatrol
    • one year ago
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    to what? and why?

  35. anonymous
    • one year ago
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    to 0

  36. skullpatrol
    • one year ago
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    yes, why?

  37. arindameducationusc
    • one year ago
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    @skullpatrol good job in helping her

  38. skullpatrol
    • one year ago
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    thanks @arindameducationusc :-)

  39. anonymous
    • one year ago
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    I'm not sure why. You kinda just told me so I went with it if I'm being honest.

  40. anonymous
    • one year ago
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    you said the divisor has to be = to 0

  41. skullpatrol
    • one year ago
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    Let me show you why...

  42. skullpatrol
    • one year ago
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    |dw:1440075940828:dw|

  43. skullpatrol
    • one year ago
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    |dw:1440076091981:dw|