Posted by **kiearra** on Sunday, December 28, 2008 at 2:57pm.

factor the expression:

10a^2-19a+7

ok I no how to start of which would be

(10a- )(a+ )

but i dont no how to factor it from here

- math -
**Reiny**, Sunday, December 28, 2008 at 3:04pm
If you are in a class-room situation, then you should have been taught some kind of "method" to do these, just plain guessing works only up to a point.

there are actually two choices for the first terms

(10x..)(x...) or (5x....)(2x....)

at the back it would have to be

(..-7)(...-1) or (...+7)(...+1)

remember, after you make your choice, expand to see if you get the original.

- math -
**kiearra**, Sunday, December 28, 2008 at 3:09pm
ok i get it now i just didnt no what to do with the middle number

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