How do you use the quadratic formula?

So we use the quadratic formula to find out 2 values of x satisfies the quadratic equation we have been given. First we need to write the quadratic formular down, (x=-b.. etc). If you see, we need to plug in 3 different numbers corrosponding to a, b and c into the formula to find what x is. A, b and c can be found by looking at the numbers in front of the x terms in our quadratic equation. 'A' is the number found before the x2 term, 'b' before the x term and c is the final number which isnt linked to one of the x terms. If you insert these numbers into the quadratic formula, once adding the square root and once minusing it, you will get the 2 values of x you have been looking for. 

Answered by Amy B. Maths tutor

2561 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

what is the determinant of a 2x2 matrix


Solve these equations simultaneously: (1) 5x - 10z = -45 and (2) 9x = -5z + 80


Solve: 2x^2 + x = x^2 - 4(x+1)


How do I solve the following question. 'Find the values of x such that 2log3(x) - log3(x-2) = 2'.


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 2013–2024

Terms & Conditions|Privacy Policy
Cookie Preferences