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Mathematics 17 Online
OpenStudy (anonymous):

PLEASE HELP ME!!! factor the trinomial 7t^4-10t^2-125

OpenStudy (mertsj):

The only factor of 7 are 1 and 7 so start out like this: (7t^2 )(t^2 )

OpenStudy (anonymous):

thats wat i got

OpenStudy (mertsj):

The factors of -125 are -1, 125 1,-125 -5, 25 5.-25

OpenStudy (mertsj):

I would try -5 and 25 first.

OpenStudy (anonymous):

i tried that

OpenStudy (mertsj):

Post it.

OpenStudy (anonymous):

?

OpenStudy (anonymous):

(7t^2-5)(t^2+25)

OpenStudy (mertsj):

Does that work?

OpenStudy (anonymous):

no :(

OpenStudy (mertsj):

Then switch the 25 with the -5 and try that.

OpenStudy (anonymous):

THANK U!!!!!!!!

OpenStudy (mertsj):

yw

OpenStudy (anonymous):

one more?

OpenStudy (mertsj):

ok

OpenStudy (anonymous):

5x^2y^2+20xy+1

OpenStudy (mertsj):

The only possibility is : (5xy+1)(xy+1)

OpenStudy (mertsj):

Since that won't work, put down "prime"

OpenStudy (anonymous):

THANKS !!!!!!!!!

OpenStudy (mertsj):

yw

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