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