factorisation help! (1 Viewer)

[theonly1]

hey,

i got given a question;

y= 2x^3+2x^2-2x-1 and need help factorising it.

I know that you need the factors of d which is -1 and it need to give you zero. but it doesnt. So what are the intercepts?

 

[Ikki]

That cannot be factorised, even if, it will look ugly. Please clarify the question.

Do you want the solutions?
solutions for x are around:-1.5, -0.4 and 0.9

Y-intercepts?
y=-1

X-intercepts?
x is around -1.5, -0.4 and 0.9

But these solutions for x have been found using a calculator by the halving the interval method. No actual way to find the x-intercepts on a 2 unit level without calc. Please check the question.