7. Să se efectueze:
3 5x
x+1 2+3.x + 2
2x+5 2-X 3.x +4
+
x 3 x+3 x² – 9
+2
x(x+2)+5 x+4
b)
x² + 4x+3 x+3
2
x+5
d)
x-1' x2+x+1
=
+
2​