How do you factor 15x^3-21x^2+20x-28? Algebra Polynomials and Factoring Factoring by Grouping 1 Answer Sonnhard Jun 21, 2018 (5x-7)(3x^2+4) Explanation: Expanding we get 15x^3-21x^2+20x-28 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 2206 views around the world You can reuse this answer Creative Commons License