Mathematics
8 Online
OpenStudy (anonymous):
Multiply
(y^2-2y-6)(y+5)
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OpenStudy (tiffanymak1996):
do you know how to multiply polynomials?
OpenStudy (tiffanymak1996):
like what (x+1)(x+2) =?
OpenStudy (anonymous):
yes, that's what I've been learning this week.
OpenStudy (anonymous):
I've used the FOIL method also
OpenStudy (tiffanymak1996):
yes, that's a good method to start with
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OpenStudy (anonymous):
:)
OpenStudy (anonymous):
but with this question , am I supposed to multiply y by (y^2) (-2y) and (-6) and then 5 by (y^2) (-2y) and (-6) and then add them all together?
OpenStudy (anonymous):
pleas pick best response
OpenStudy (tiffanymak1996):
yes!
OpenStudy (anonymous):
ok, so I was on the right track then.... :)
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OpenStudy (tiffanymak1996):
gr8!
OpenStudy (anonymous):
thanks! I am struggling with this intermediate course, and always second guessing myself:)
OpenStudy (tiffanymak1996):
don't, go with your instincts, but it's nice to get help too!
OpenStudy (anonymous):
yes, thanks a bunch!
OpenStudy (tiffanymak1996):
ok, good luck with your course!
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OpenStudy (anonymous):
thanks
OpenStudy (anonymous):
ok, does anyone know if the answer would be....
3y^2-16y-30y^3 ?
OpenStudy (tiffanymak1996):
wait, there should be four terms in your answer...
OpenStudy (anonymous):
3y^2- 16y -30 + y^3 ?
OpenStudy (tiffanymak1996):
yes!
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OpenStudy (anonymous):
sweet! ty
OpenStudy (tiffanymak1996):
oh, and becareful what the question ask you to do with the listing of the polynomials
OpenStudy (tiffanymak1996):
some says descending power and some says ascending power.
OpenStudy (anonymous):
okay, yes, I have seen some of the questions asking for them to be in descending order.
OpenStudy (tiffanymak1996):
so if in this case the answer has to be : y^3 +3y^2 -16y-30
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OpenStudy (anonymous):
thank you
OpenStudy (tiffanymak1996):
no problem:)