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.

Answered by Ben P. Maths tutor

10120 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

Christine has more money than David. If Christine gave David £30, then they would have the same amount. If David gave Christine £33, then Christine would have twice as much money as David. How much money does each person have?


Work out the value of (16/81)^3/4


2x+y=18, x-y=6; Solve the simultaneous equations


Please factorise and solve x^2 -1 = 0


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