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Mathematics 13 Online
OpenStudy (anonymous):

Help with algebra 2 please

OpenStudy (arindameducationusc):

hello

OpenStudy (phi):

f/g means divide f's expression by g's

OpenStudy (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

OpenStudy (arindameducationusc):

@phi can i try this one? you can verify me if i am wrong

OpenStudy (anonymous):

@arindameducationusc hi

OpenStudy (anonymous):

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

OpenStudy (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

OpenStudy (arindameducationusc):

yes you are going the right way... just be careful with the domain.

OpenStudy (arindameducationusc):

@lily1021 do you know how to divide polynomials?

OpenStudy (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

OpenStudy (arindameducationusc):

@phi you are right

OpenStudy (arindameducationusc):

yes @phi if g(x) is zero then it wont be defined

OpenStudy (skullpatrol):

But, do you know why you can never divide by 0 @lily1021 ?

OpenStudy (anonymous):

because you can't find an answer

OpenStudy (anonymous):

i've divided polynomials before but i'm usually a hit or miss with them

OpenStudy (skullpatrol):

Yes, that makes it "undefined."

OpenStudy (anonymous):

right

OpenStudy (skullpatrol):

Division by 0 has no meaning in the set of real numbers.

OpenStudy (anonymous):

so I'm not going to divide then? Idk my heads spinning

OpenStudy (skullpatrol):

Just like a word that has no meaning is undefined in the dictionary :-)

OpenStudy (skullpatrol):

Yes, first you divide one polynomial into the other.

OpenStudy (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.

OpenStudy (skullpatrol):

Does that procedure make sense @lily1021 ?

OpenStudy (skullpatrol):

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