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

4137 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

How do I factorise x^2 - 5x + 6


Simplify 2a+6b-a+2b+3a


Square ABCD has length (x+3)cm and area 10cm^2. Show x^2 + 6x = 1


If side A is 3m and side B is 4m, what would be the length of the remaining side C?


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