a)
5. Efectuați:
X
X +1 3-2x;b)
2X+1 X-2
.:
X-2 5x-10 2X-6 3X-9
XP-9 XP-6X +9
c)
5X -10 X:-1; d)
X +1 X-4
4Y2 - 4
Y: - y
