How do you factor completely 3x^2 + 4x -15? Algebra Polynomials and Factoring Factoring Completely 1 Answer Özgür Özer Dec 24, 2015 color(white)xx3x^2+4x-15=3(x-5/3)(x+3) Explanation: color(white)xx3(x-5/3)(x+3)=3(x^2+3x-(5x)/3-5) color(white)(xxxxxxxxxxxxxx)=3(x^2+(9x-5x)/3-5) color(white)(xxxxxxxxxxxxxx)=3x^2+4x-15 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 4557 views around the world You can reuse this answer Creative Commons License