How do you solve x^2+1.4x=1.2 by completing the square? Precalculus Linear and Quadratic Functions Completing the Square 1 Answer Barney V. Dec 27, 2016 x=-0.6 or x=-2 Explanation: x^2+1.4x=1.2 (x^2+1.4x-1.2=0 (x-0.6)(x+2) x-0.6=0 x=0.6 x+2=0 x=-2 Answer link Related questions What does completing the square mean? How do I complete the square? Does completing the square always work? Is completing the square always the best method? Do I need to complete the square if f(x) = x^2 - 6x + 9? How do I complete the square if f(x) = x^2 + 4x - 9? How do I complete the square if the coefficient of x^2 is not 1? How do I complete the square if f(x) = 3x^2 + 12x - 9? If I know the quadratic formula, why must I also know how to complete the square? How do I use completing the square to describe the graph of f(x)=30-12x-x^2? See all questions in Completing the Square Impact of this question 1600 views around the world You can reuse this answer Creative Commons License