# Thread: [SOLVED] Completing the Square

1. ## [SOLVED] Completing the Square

I've got some exercises for completing the square but the way I've been shown to work it out doesn't work because halfing the three causes problems. Can anybody help me with these exercises?

$x^2 - 3x + 7$

$x^2 - 3x + 4$

Thanks

2. Originally Posted by beeohbee27
I've been shown to work it out doesn't work because halfing the three causes problems.

$x^2 - 3x + 7$
Leave halving 3 as a fraction

$x^2 - 3x \left(+\frac{9}{4}\right)+ 7\left(-\frac{9}{4}\right)$

$\left(x - \frac{3}{2}\right)^2 +\frac{19}{4}$

3. Simple as that. I was thinking there may be some kind of way to get an answer in integers but I can see that this is the way to do it now.