Evaluate x2+x+1x^2 + x + 1x2+x+1 for x=\ac12x = \ac{1}{2}x=\ac12.
1.751.751.75 (or 7/47/47/4)
1.251.251.25 (or 5/45/45/4)
2.52.52.5
0.750.750.75 (or 3/43/43/4)