Factorise 8a^2 - 50b^2 completely.

  • Google+ icon
  • LinkedIn icon
  • 737 views

In this expression the student must recognise the form is typical of a difference of squares situation (when you have two terms squared and a minus sign between them). This means the factorisation will be two expressions in brackets, one with a plus sign and the other with a minus sign, so something like this:

(4a + 10b)(2a - 5b)

You can further factorise a 2 out of the first brackets to get:

2(2a + 5b)(2a - 5b)

And now you cannot factorise further so the factorisation is complete.

Cesar Manuel F. 13 plus  Maths tutor, GCSE Physics tutor, GCSE Comput...

About the author

is an online GCSE Maths tutor with MyTutor studying at University College London University

Still stuck? Get one-to-one help from a personally interviewed subject specialist.

95% of our customers rate us

Browse tutors

We use cookies to improve your site experience. By continuing to use this website, we'll assume that you're OK with this. Dismiss

mtw:mercury1:status:ok