Quote Originally Posted by spoonitnow View Post
And that's as good as you're going to make them look in text.
The bottom terms can be slightly simplified, although it doesn't really look that much prettier in the text.

2 + a(1-a) = 2 + a - a^2 = -1(a^2 - a - 2) = -1(a-2)(a+1) = (2-a)(a+1)

y_1 = (1-a)/(2+a(1-a)) = (1-a)/( (2-a)(a+1) )
x_1 = 2(1-a)/(2+a(1-a)) = 2(1-a)/( (2-a)(a+1) )
y_0 = 2/(2+a(1-a)) = 2/( (2-a)(a+1) )