can somebody check this?

Factor completely. If a polynomial is prime, state this.
−70a^4 + 68a^3 − 16a^2

= 2a^2 (-35a^2 + 34a + 8]

Question

can somebody check this? 

Factor completely. If a polynomial is prime, state this.
−70a^4 + 68a^3 − 16a^2

= 2a^2 (-35a^2 + 34a + 8]

inkyvoyd · Answer

Oh ewh. Hard factoring. Put that into wolfram alpha.

inkyvoyd · Answer

For checking, wolfram alpha is usually faster and better.

anonymous · Answer

what is that?

inkyvoyd · Answer

First, I need to say that I think (-35a^2 + 34a + 8] can be factored

inkyvoyd · Answer

second

lgbasallote · Answer

clue...20 + 14 = 34...

inkyvoyd · Answer

http://www.wolframalpha.com/input/?i=factor+%E2%88%9270a%5E4+%2B+68a%5E3+%E2%88%92+16a%5E2

lgbasallote · Answer

2a^2(-35a^2 + 34a - 8)
2a^2(-35a + 14a + 20a - 8)
2a^2(-7a(5a -2) + 4(5a -2))
2a^2(5a - 2)(-7a +4)

if you'd like to learn that method of splitting the middle term..i suggest you contact Hero, another OpenStudy since i just saw this method from him and he offers free lessons regarding this

anonymous · Answer

i would. thank you so much! i just need to check so i can get this in for the night. thank you!

inkyvoyd · Answer

For checking, just use wolfram alpha.

inkyvoyd · Answer

But, note that wolfram alpha is not good at showing work, nor should you ever use it for cheating.

anonymous · Answer

i have one more but that wolfram alpha didn't seem to check?