Thread: Factorising polynomial

I can do this for most, but this ones got me stuck!

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

I tried putting in values of x to make it = 0 but can't find one.

Originally Posted by hciR

I can do this for most, but this ones got me stuck!

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

I tried putting in values of x to make it = 0 but can't find one.

Hello hciR,

Rearrange:

Group:

Oh I see, I don't think I would ever have spotted the re-arranging bit. Thanks!

Originally Posted by hciR

Oh I see, I don't think I would ever have spotted the re-arranging bit. Thanks!

Sometimes, you just have to try a few different ways. Here, there were only a few grouping options to try. Grouping the first two terms and last two terms didn't lead anywere, so I tried the first and third terms, then the second and fourth.