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Mathematics 13 Online
OpenStudy (anonymous):

new to this site, i need help with factoring complex trinomials

OpenStudy (anonymous):

Any example problems?

OpenStudy (anonymous):

sure, i'll put" for squared, okay? 27a"b"'+9a"b" - 18a"'b"

OpenStudy (anonymous):

okay, one moment

OpenStudy (anonymous):

"' is cubed

OpenStudy (anonymous):

sorry for the wait.... just hold on a couple more minutes please

OpenStudy (anonymous):

?

OpenStudy (anonymous):

still working on it... algebra was so long ago... sorry for the wait again

OpenStudy (anonymous):

Ok here it goes:

OpenStudy (anonymous):

So first you need to look for a common factor in the numbers.

OpenStudy (anonymous):

So in this case the factor is 9.

OpenStudy (anonymous):

Then you look at the variables, look for the a, the lowest form of a is a'', so you can use this

OpenStudy (anonymous):

Now look at the b, the lowest form is b''

OpenStudy (anonymous):

Now put that together 9a''b''

OpenStudy (anonymous):

now how many times does 9a''b'' fit in 27a''b'''?

OpenStudy (anonymous):

3b

OpenStudy (anonymous):

moving on.... how many times does 9a''b'' fit into 9a''b''? Once of course

OpenStudy (anonymous):

Now same thing but how many times does it fit into -18a'''b''?

OpenStudy (anonymous):

-2a

OpenStudy (anonymous):

Now put it together...

OpenStudy (anonymous):

you get: 9a''b''(3b+1-2a)

OpenStudy (anonymous):

Ta da! all factored!

OpenStudy (anonymous):

Do you understand what i'm trying to explain?

OpenStudy (anonymous):

i know how to get that far, but we need to go further

OpenStudy (anonymous):

How so?

OpenStudy (anonymous):

do you have the answer to a sample problem so I know what you mean?

OpenStudy (anonymous):

?

OpenStudy (anonymous):

sorry, slow comp.. i need to find sum and product..

OpenStudy (anonymous):

Ok

OpenStudy (anonymous):

wait.. i just checked in the book and thats the answer, can you help me with another example?

OpenStudy (anonymous):

thank you, i think it helped me, i have to go now, bye

OpenStudy (anonymous):

ok good luck! sorry if i didn't get what you needed

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