2 4*x + 6*x - 3
4*x^2 + 6*x - 3
2 -3 + 4*x + 6*x
-3 + 4*x^2 + 6*x
/ ____\ / ____\ | 3 \/ 21 | | 3 \/ 21 | |x + - - ------|*|x + - + ------| \ 4 4 / \ 4 4 /
(x + 3/4 - sqrt(21)/4)*(x + 3/4 + sqrt(21)/4)
-3.0 + 4.0*x^2 + 6.0*x
-3 + 2*x*(3 + 2*x)