Question

Use the grouping method to factor the polynomial below completely.
3x^3 + 9x^2 + 4x + 12

Answer 1

Answer:

$(x+3)(3x^{2}+4)$

Step-by-step explanation:

$3x^{3}+9x^{2}+4x+12\\3x^{2}(x+3)+4(x+3)\\(x+3)(3x^{2}+4)$