/ ________________\ / ________________ \ | / 2 | | / 2 | | 1 b \/ 1 - 3*b - 2*b | | 1 \/ 1 - 3*b - 2*b b| (a - b)*|a + - + - + -------------------|*|a + - - ------------------- + -| \ 2 2 2 / \ 2 2 2/
((a - b)*(a + 1/2 + b/2 + sqrt(1 - 3*b^2 - 2*b)/2))*(a + 1/2 - sqrt(1 - 3*b^2 - 2*b)/2 + b/2)