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# Express y=x^2+x-12 in the form (x+a)^2-b

1. I've got

(x-2)^2-12

but not sure if correct?
2. (Original post by Prefetch)
I've got

(x-2)^2-12

but not sure if correct?
This is not quite right. If you expand out what you got, you get

When we have something in the form , we can write it in the form by letting and then .

3. Thanks.

(x+0.5)^2 - 12.25
4. (Original post by Prefetch)
Thanks.

(x+0.5)^2 - 12.25
That's right!
5. (x+0.5)^2 - 12.25

Complete the square!
6. (Original post by Mike173)
(x+0.5)^2 - 12.25

Complete the square!
7. (Original post by Prefetch)
Completing the square is the process of converting an expression of the form into the form .

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