Write 𝑥²+6𝑥+11 in the form (𝑥+a)²+b.

This question wants you to "complete the square". To start this question we put a = (coefficient of x)/2 = 6/2 = 3.So far we have 𝑥²+6𝑥+11 = (𝑥+3)²+b. We now need to find b. We can expand and simplify the right hand side to get 𝑥²+6𝑥+11 = 𝑥²+6𝑥+9+b. We should now be able to see that b=2. So 𝑥²+6𝑥+11 = (𝑥+3)²+2.

BP
Answered by Ben P. Maths tutor

11267 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

There are "n" sweets in a bag, six are orange and the rest are yellow. If you take a random sweet from the bag and eat it. Then take at random another one and eat it. The probability of eating two orange sweets is 1/3. Show that n²-n-90=0.


How do I solve x-6=15?


Express 56 as the product of its prime factors


What is the range of the function y = x^2?


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