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# Very quick help watch

1. Hi,

How would I complete the square of x^2 - 4root2 + 5 ? I know how to complete the square in general, but don't know how to do this one. Could someone provide a worked solution?
2. (Original post by Alex-Torres)
Hi,

How would I complete the square of x^2 - 4root2 + 5 ? I know how to complete the square in general, but don't know how to do this one. Could someone provide a worked solution?
Is that (4root2)*x?
3. (Original post by Alex-Torres)
Hi,

How would I complete the square of x^2 - 4root2 + 5 ? I know how to complete the square in general, but don't know how to do this one. Could someone provide a worked solution?
Is that supposed to be ? As it stands, this is already in 'completed square' form.
4. (Original post by joostan)
Is that (4root2)*x?
Yes, sorry!
5. (Original post by Alex-Torres)
Yes, sorry!
x2 + bx + c => (x + b/2)2 - (b/2)2 + c still holds true. It is the same process regardless of the surd. . .
6. (Original post by Farhan.Hanif93)
Is that supposed to be ? As it stands, this is already in 'completed square' form.
Eh?
7. (Original post by Mr M)
Eh?
By "this", I'm referring to the expression in the OP without the x term, if that clarifies what I meant? (admittedly, my wording was a little lazy).
8. (Original post by Farhan.Hanif93)
By "this", I'm referring to the expression in the OP without the x term, if that clarifies what I meant? (admittedly, my wording was a little lazy).
Oh I see.

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