How do you factor #a^2 + 7a - 30#? Algebra Polynomials and Factoring Factoring by Grouping 1 Answer Lasani · Stefan V. May 16, 2018 Answer: #(a+10)(a-3)# Explanation: You have to find two factors (#x# and #y#), where #x+y= +7" "# and where #" "x*y = 30# #a^2 + 10a - 3a + 30 # Then take the common factor out. #a(a + 10) - 3(a+10)# #(a-3)(a+10)# 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 484 views around the world You can reuse this answer Creative Commons License