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.

KW
Answered by Katie W. Maths tutor

7415 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

How do you find the intersection of a straight line and a curve?


Ed has 4 cards. There is a number on each card. Three of the numbers are 12, 6 and 15. The mean of the numbers is 10. What is the fourth number?


Write x² + 4x -16 = 0 in the form (x+a)² - b = 0. Solve the equation giving your answer in surd form as simply as possible.


Can you explain when we flip the inequality direction when solving inequalities.


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