Express x^2-7x+2 in the form (x-p)^2+q where p and q are rational. Hence or otherwise find the minimum value of x^2-7x+2

For the first part, use the 'complete the square method', which gives (x-7/2)-49/4+2, simplified to (x-7/2)2-41/4. To find the answer for the second part, set x=7/2 so that the bracketed part becomes 0, meaning the minimum value is 41/4

Answered by Connaire W. Maths tutor

4304 Views

See similar Maths A Level tutors

Related Maths A Level answers

All answers ▸

Show that the volume of the solid formed by the curve y=cos(x/2), as it is rotated 360° around the x-axis between x= π/4 and x=3π/4, is of the form π^2/a. Find the constant a.


What is differentiation used for in the real world?


Integrate 5cos(3x - 1) with respect to x


Express cos(2x) in terms of acos^2(x) + b


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