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Mathematics 8 Online
OpenStudy (anonymous):

Multiply (y^2-2y-6)(y+5)

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

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.... :)

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!

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!

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

OpenStudy (anonymous):

thank you

OpenStudy (tiffanymak1996):

no problem:)

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