solve 2x^2+4x-7=0

Notice that this is a quadratic. First you should try factorisation, then if unsuccessful try completing the square (or the quadratic formula). In this example, factorisation is not possible (I can this further with demonstration.) So we must try Completing the square. Since the x^2 term has a '2' in front of it, we must get rid of this first, by taking it out as a factor. Then follow the give procedure for completing the square (I can show this further using the white board). If the student struggles with this approach I would consider letting them just use the quadratic formula - this would be a good way to check too.

Answered by Katie W. Maths tutor

6853 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

Here are three expressions. b/a, a – b, and ab. When a = 2 and b = -6, which expression has the smallest value?


How do i solve quadratic equations?


How do I find the minimum turning point of a parabola?


Write 2x^2 + 16x + 26 in the form a(x + d)^2 + e where a, d, and e are integers.


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