How would I answer this question? Use factor theorem to show (x-2) is a factor of f(x) = 2x^3 -7x^2 +4x +4.

The first step is to find out the value of x for which your bracket/value you think is a factor equals 0. So, x – 2 = 0, therefore x = 2. Now plug in this value into your original equation and if the result is 0, your bracket is a factor. So f(2) = 2(2^3) – 7 (2^2) +4(2) +4 = (28) – (74) + 8 + 4 = 16 – 28 + 12 = 0. Therefore (x-2) is a factor.

Answered by Maria S. Maths tutor

4086 Views

See similar Maths A Level tutors

Related Maths A Level answers

All answers ▸

For which values of x is the following inequality satsified: x^2 + 6x + 6 < 1


Prove the identity (4cos(2x))/(1+cos(2x)) = 4-2sec^2(x)


A tunnel has height, h, (in metres) given by h=14-x^2 where x is the horizontal distance from the centre of the tunnel. Find the cross sectional area of the tunnel. Also find the maximum height of a truck passing through the tunnel that is 4m wide.


Derive the formula for differentiation from first principles


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences