Answer:
[tex]3 {x}^{2} + 2x + 3 + ( {x}^{2} + x + 1) \\ = 3 {x}^{2} + {x}^{2} + 2x + x + 3 + 1 \\ = 4 {x}^{2} + 3x + 4 \\ thank \: you[/tex]
13
Step-by-step explanation:
hope this helps
