Rearranging Formulae

To rearrange a formula, it is required that you group variables in certain ways, to leave you with the desired form.

For example,

Rearrange y=3x^2+3 to make x the subject.

Firstly, we want to isolate the x, and try and work out how we can get it to become just x on its own.

To do this, first subtract all the constants from the right hand side of the equation:

y-3 = 3x^2

Now manipulate the left hand side to leave you with x:

x^2 = (y-3)/3

x = ((y-3)/3)^(1/2)

Answered by Alex H. Maths tutor

4670 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

What is the easiest way to expand quadratic equations?


Solve the simultaneous equations: 2x + 3y = 5 and 3x + 4y = 12


P is a point on the circle with equation x^2 + y^2 = 80. P has x-coordinate 4 and is below the x-axis.Work out the equation of the tangent to the circle at P.


What is meant by 'the degree of a polynomial'?


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