anonymous
  • anonymous
Help with algebra 2 please
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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arindameducationusc
  • arindameducationusc
hello
phi
  • phi
f/g means divide f's expression by g's
arindameducationusc
  • arindameducationusc
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

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arindameducationusc
  • arindameducationusc
@phi can i try this one? you can verify me if i am wrong
anonymous
  • anonymous
@arindameducationusc hi
anonymous
  • anonymous
okay so like -20x^2 + 14x + 12 / 5x - 6 That's what I thought it was initially, but not sure.
phi
  • phi
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
arindameducationusc
  • arindameducationusc
yes you are going the right way... just be careful with the domain.
arindameducationusc
  • arindameducationusc
@lily1021 do you know how to divide polynomials?
phi
  • phi
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
arindameducationusc
  • arindameducationusc
@phi you are right
arindameducationusc
  • arindameducationusc
yes @phi if g(x) is zero then it wont be defined
skullpatrol
  • skullpatrol
But, do you know why you can never divide by 0 @lily1021 ?
anonymous
  • anonymous
because you can't find an answer
anonymous
  • anonymous
i've divided polynomials before but i'm usually a hit or miss with them
skullpatrol
  • skullpatrol
Yes, that makes it "undefined."
anonymous
  • anonymous
right
skullpatrol
  • skullpatrol
Division by 0 has no meaning in the set of real numbers.
anonymous
  • anonymous
so I'm not going to divide then? Idk my heads spinning
skullpatrol
  • skullpatrol
Just like a word that has no meaning is undefined in the dictionary :-)
skullpatrol
  • skullpatrol
Yes, first you divide one polynomial into the other.
skullpatrol
  • skullpatrol
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.
skullpatrol
  • skullpatrol
Does that procedure make sense @lily1021 ?
skullpatrol
  • skullpatrol
|dw:1440074722497:dw|
anonymous
  • anonymous
yes I have that down on my paper
anonymous
  • anonymous
just like that too
anonymous
  • anonymous
i'm getting 5x-6
skullpatrol
  • skullpatrol
|dw:1440074924187:dw|
anonymous
  • anonymous
okay I see that
skullpatrol
  • skullpatrol
|dw:1440075267669:dw|
anonymous
  • anonymous
yeah I was wondering if +12 was supposed to be there too. Yep
skullpatrol
  • skullpatrol
What is the second thing we need to do now?
anonymous
  • anonymous
set the divisor?
skullpatrol
  • skullpatrol
to what? and why?
anonymous
  • anonymous
to 0
skullpatrol
  • skullpatrol
yes, why?
arindameducationusc
  • arindameducationusc
@skullpatrol good job in helping her
skullpatrol
  • skullpatrol
thanks @arindameducationusc :-)
anonymous
  • anonymous
I'm not sure why. You kinda just told me so I went with it if I'm being honest.
anonymous
  • anonymous
you said the divisor has to be = to 0
skullpatrol
  • skullpatrol
Let me show you why...
skullpatrol
  • skullpatrol
|dw:1440075940828:dw|
skullpatrol
  • skullpatrol
|dw:1440076091981:dw|