How do you factor #4-4x^2-4y^2+8xy#? Algebra Polynomials and Factoring Factoring Completely 1 Answer Mir Tareq Jun 13, 2015 4, (1+x-y), (1-x+y) Explanation: #4−4x^2−4y^2+8xy=4{1^2-(x^2-2xy+y^2)}=4{1^2-(x-y)^2}=4(1+x-y)(1-x+y)# Answer link 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 2838 views around the world You can reuse this answer Creative Commons License