Răspuns :
a) |V2-1|+|2-V2| = V2-1+2V2 = -1+2 = 1
b) |V3-3|+|1-V27|+2V3 = 3-V3+|1-3V3|+2V3 = = 3-V3+3V3-1+2V3 = 2+4V3
c) |3V2-V5|-|2V5-5V2| = 3V2-V5-5V2+2V5 = -2V2+V5
d) V(3V2+V7)^2 + V(3V2-2V7)^2 = 3V2+V7+2V7-3V2 = 3V7
V - radical
