How do you factor by grouping: r^2 - 20tw + 4wr - 5tr? Algebra Polynomials and Factoring Factoring by Grouping 1 Answer Meave60 ยท Pris Apr 9, 2015 r^2-20tw+4wr-5tr Group r^2 and -5tr, and 4wr-20tw. r^2-5tr+4wr-20tw Factor out the r from the first group, r^2-5tr. r(r-5t)+4wr-20tw Factor out 4w from the second group, 4wr-20tw. r(r-5t)+4w(r-5t) Factor out the common term. (r+4w)(r-5t) 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 2879 views around the world You can reuse this answer Creative Commons License