How do you factor #12n^3+15n^2+4n+5#? Algebra Polynomials and Factoring Factoring by Grouping 1 Answer Alan P. May 3, 2015 #12n^3+15n^2+4n+5# By inspection the first two terms are #3n^2# times the last two terms #12n^3+15n^2+4n+5# #=(3n^2)(4n+5) + (1)(4n+5)# #=(3n^2+1)(4n+5)# Answer link Related questions What is Factoring by Grouping? How do you factor by grouping four-term polynomials and trinomials? Why does factoring polynomials by grouping work? How do you factor #2x+2y+ax+ay#? How do you factor #3x^2+8x+4# by using the grouping method? How do you factor #6x^2-9x+10x-15#? How do you group and factor #4jk-8j^2+5k-10j#? What are the factors of #2m^3+3m^2+4m+6#? How do you factor quadratics by using the grouping method? How do you factor #x^4-2x^3+5x-10#? See all questions in Factoring by Grouping Impact of this question 1946 views around the world You can reuse this answer Creative Commons License