Use synthetic division to find f (-5) if f(x)=2x^6-49x^4+3x^3-14x^2-2x-14

a. -104
b. 626
c. -76
d. none of these

Question

Use synthetic division to find f (-5) if f(x)=2x^6-49x^4+3x^3-14x^2-2x-14

a. -104
b. 626
c. -76
d. none of these

anonymous · Answer

so synthetically divide it. do you forget how to?

anonymous · Answer

Yep I'm not sure how to synthetically divide....

anonymous · Answer

alright its hard to explain but you only use the coefficients and if it skips a degree like the above skips ^5 you have to insert a 0 there. then you drop the lead coefficient down then finish the synthetic division. its hard to explain without picture. go to khanacademy.org for video

anonymous · Answer

Okay, thanks!

anonymous · Answer

I think the answer is d

anonymous · Answer

I haven't worked it but what did you get for the remainder?

anonymous · Answer

The remainder was -706 I think?

anonymous · Answer

if you're not confident, just plug -5 in for x and see if its the same number

anonymous · Answer

Alright, thanks for your help!

anonymous · Answer

no problem