Where does the quadratic formula come from?

This is one of the most common a level math question. One which is essential to understand as it gives a firm understanding of core fundamental principles in math which are Completing the square and Algebra Manipulation.It is simple, you start with the general quadratic equation: ax^2 +bx + c = 0, and use the 'Complete the square' technique to this, and the with some algebra manipulation, you can reach the final quadratic formula.

Answered by Riyadh M. Maths tutor

2725 Views

See similar Maths A Level tutors

Related Maths A Level answers

All answers ▸

(a) Express x +4x+7 in the form (x+ p) +q , where p and q are integers.


Let p(x) =30x^3 - 7x^2 -7x + 2. Prove that (2x+1) is a factor of p(x).


Explain why for any constant a, if y = a^x then dy/dx = a^x(ln(a))


What is the value of sin(theta), cos(theta), tan(theta) where theta = 0, 30, 45, 60, 90


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