Question

Find all the rational zeros of the function.

C(x)= 2x^3 + 3x^2 -1

Answer 1

your POSSIBLE zeroes are \[\pm 1\; , \; \pm \frac 12\]
does that help?

Answer 2

I had gotten that far. But I tried synthetic division with all possible, and couldn't get any to work out right.

Answer 3

let me teach you the factor theorem

pick one from 1, -1, 1/2 and -1/2

then substitute it to ALL the x in 2x^2 + 3x^2 - 1

find out which one gives you 0

Answer 4

Oh. With synthetic division, I had to add in a 0x, right?

Answer 5

yep

Answer 6

Yeah, that was my problem. Thanks for the help!

Answer 7

welcome