1. ## Completing the square

How do you complete the square of $(-2y^2 +2yz -z^2)/2$

into the form $-(a((x-b)^2))/2$

How do you complete the square of $(-2y^2 +2yz -z^2)/2$

$\frac{-2y^2 + 2yz - z^2}{2}$

$-\frac{y^2 + y^2 - 2yz + z^2}{2}$

$-\frac{y^2 + (y-z)^2}{2}$

... that's about all i could do with it.

3. thanks

4. Any other ideas?

How do you complete the square of $(-2y^2 +2yz -z^2)/2$
into the form $-(a((x-b)^2))/2$