Question

Help with factoring?

Answer 1

I need to factor 8y^3 + 26y^2 - 20y
Not really sure how to do this :/

Answer 2

start by factoring out anything that is common to all terms.
all of your terms are divisible by 2y so factor that out first and then deal with what's left.

Answer 3

okay so
2y^2 * 4y = 8y^3
13y * 2y = 26y^2
-2y * 10 = -20y

Answer 4

almost...
\[8y^3+26y^2-20y=(2y)(4y^2)+(2y)(13y)-(2y)(10) = 2y(4y^2+13y-10)\]

Answer 5

you sure it's not +20y?

Answer 6

nope its -20y

Answer 7

4y^2+13y -10 does not factor nicely so you are done

however, if it were 4y^2 +13y +20 it would factor nicely

Answer 8

so the answer is 2y(4y^2 + 13y - 10)?

Answer 9

yes, that is the simplest factoring... but I am suspicious they have a typo in the question

Answer 10

Could be, humans make mistakes

Answer 11

Thanks guys!

Answer 12

you're welcome!