Question

I think we use the FOIL right?

Answer 1

(Don't use FOIL, that's only for multiplying binomials!)

3x^2 + 9x + 1

Explanation:

Step 1: Combine like terms:

• 
  `5x - 2 + 3x^2 + 4x + 3`
• 
  `(3x^2) + (5x + 4x) + (-2 + 3)`
• 
  `3x^2 + 9x + 1`

Therefore, the answer is 3x^2 + 9x + 1.