Use the grouping method to factor the polynomial below completely.

3x3 + 6x2 + 5x + 10

(3x² + 5) (x + 2)

Step-by-step explanation:

3x³ + 6x² + 5x + 10

→ Factor 3x³ + 6x² by taking out the LCM of the number

3x² (x + 2)

→ Factor 5x + 10 by taking out the LCM of the number

5 (x + 2)

→ Combine the 2 brackets together

(3x² + 5) (x + 2)

→ Expand to check its the right answer, if you get 3x³ + 6x² + 5x + 10 then it is correct

(3x² + 5) (x + 2) = 3x³ + 6x² + 5x + 10