Answer:
Option A
Step-by-step explanation:
The given trinomials are ( 3x² + 4x + 3 ) and ( 3x² + 6x )
By adding the trinomials ( 3x² + 4x + 3 + ( 3x² + 6x )
By grouping the similar terms ( 3x² + 3x² ) + 4x + 6x ) + 3
= 6x² + 10x + 3
Option A is the polynomial which represents the sum.
