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# maths Watch

1. I'm completing the square x^2-6x+11 but I dont know if the answer should be (x-3)^2 + 20 or plus 2 and the same with question x^2-8x+17. can anyone help?
2. (Original post by rosilo)
I'm completing the square x^2-6x+11 but I dont know if the answer should be (x-3)^2 + 20 or plus 2 and the same with question x^2-8x+17. can anyone help?
(x-3)^2-9+11

-9 + 11 =??
that would be ur constant. Same with the other question
3. (Original post by rosilo)
I'm completing the square x^2-6x+11 but I dont know if the answer should be (x-3)^2 + 20 or plus 2 and the same with question x^2-8x+17. can anyone help?
-3 x -3 = 9, so it's +2 to get to 11
4. (Original post by rosilo)
I'm completing the square x^2-6x+11 but I dont know if the answer should be (x-3)^2 + 20 or plus 2 and the same with question x^2-8x+17. can anyone help?
Why would it be +20?

You're essentially doing:

5. Thats what I assumed, just wanted to double check, thank you guys

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