How do I solve a cubic?

You can solve a cubic by applying factor theorem. This is where you plug different values for x into your cubic f(x) = ax^3 + bx^2 + cx + d such that x is a factor of d, until you find a value t for which f(t) = 0. From here factorise the cubic and solve the remaining quadratic equation by the same method, by factorisation, completing the square or by the quadratic formula.

HW
Answered by Harry W. Maths tutor

3026 Views

See similar Maths A Level tutors

Related Maths A Level answers

All answers ▸

Why does differentiation give us the results that it does?


Derive from the standard quadratic equation, the form of the quadratic solution


How do I find the distance between two point in the plane?


Find the stationary points and their nature of the curve y = 3x^3 - 7x + 2x^-1


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences