How do you factor #ab + 4 + a + 4b#? Algebra Polynomials and Factoring Factoring Completely 2 Answers Kushagra Mar 16, 2018 Group it together #ab+a+4+4b# As you must have noticed by now..... it is the only way #ab+a=a(b+1)# #4+4b=4(b+1)# Put them together #a(b+1)+4(b+1)# #(a+4)(b+1)# Ujjwal Mar 16, 2018 Answer: # (a+4)(b+1)# Explanation: #ab+4+a+4b# #=> ab+a+4b+4# #=> a(b+1)+4(b+1)# #=> (a+4)(b+1)# 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 2318 views around the world You can reuse this answer Creative Commons License