Respuesta :
The sum is 4x² + 3x + 4.
The correct option is (B).
What is Algebra?
Algebra is the part of mathematics that helps represent problems or situations in the form of mathematical expressions.
Given:
(3x² + 2x + 3) + (x² + x + 1).
= 3x² + 2x + 3 + x² + x + 1
= 4x² + 3x + 4
Hence, the sum is 4x² + 3x + 4.
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