If you think you’ve got a more elegant answer then scan it and mail it to me at oxfordpat.wordpress.com@gmail.com, and if I like it I’ll put it in. Reply
Oxford PAT 
I think completing the square would be a more efficient method here 😀
If you think you’ve got a more elegant answer then scan it and mail it to me at oxfordpat.wordpress.com@gmail.com, and if I like it I’ll put it in.