How do you factor #3x^3 + 9 x^2- 12x-36#? Algebra Polynomials and Factoring Factoring Completely 1 Answer Ratnaker Mehta Sep 29, 2017 # 3(x+3)(x+2)(x-2).# Explanation: #3x^3+9x^2-12x-36,# #=3{ul(x^3+3x^2)-ul(4x-12)},# #=3{x^2(x+3)-4(x+3)},# #=3(x+3){x^2-2^2},# #=3(x+3)(x+2)(x-2).# Answer link Related questions What is Factoring Completely? How do you know when you have completely factored a polynomial? Which methods of factoring do you use to factor completely? How do you factor completely #2x^2-8#? Which method do you use to factor #3x(x-1)+4(x-1) #? What are the factors of #12x^3+12x^2+3x#? How do you find the two numbers by using the factoring method, if one number is seven more than... How do you factor #12c^2-75# completely? How do you factor #x^6-26x^3-27#? How do you factor #100x^2+180x+81#? See all questions in Factoring Completely Impact of this question 1726 views around the world You can reuse this answer Creative Commons License