How do you factor completely 3x^2 + 4x -15?

1 Answer
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