Completing the square of 2x^2 - 8x + 7 = 0

First divide everything by 2:x2 - 4x + 3.5 = 0Then divide number in front of the x by 2 and put it in a bracket squared + x. Then outside the bracket subtract the halved number squared. Keep the symbol the same, in this case the minus sign.(x-2)2-22+ 3.5 = 0(x-2)2 - 0.5 = 0(x-2)2 = 0.5x - 2 = +/- square root 0.5 x = 2 +/- square root 0.5

Answered by Maria H. Maths tutor

4562 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

Solve 2x-5=3x+4


The formula v = u +at gives the final velocity of an object as it accelerates. If v= 35, a=4 and t=5 then find u


Solve 3(3x - 2) = 5x + 10


There are 31 days in January. January 21st 2015 was a Wednesday. What day of the week was February 8th 2015?


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