How do you factor 9x^2 - 25? Algebra Polynomials and Factoring Factoring Completely 1 Answer Don't Memorise May 24, 2015 color(blue)(a^2 - b^2 = (a+b)(a-b) 9x^2 - 25 = (3x)^2 - (5)^2 (3x)^2 - (5)^2 = color(blue)((3x+5)(3x-5) 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 23019 views around the world You can reuse this answer Creative Commons License