How do you solve the quadratic 3+1x=10x2 using any method? Precalculus Linear and Quadratic Functions Completing the Square 1 Answer Alan N. Dec 7, 2016 x=−2 or +53 Explanation: 3+1x=10x2 Multiply through by x2→3x2+x=10 3x2+x−10=0 (x+2)(3x−5)=0 x=either −2 or +53 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)=x2−6x+9? How do I complete the square if f(x)=x2+4x−9? How do I complete the square if the coefficient of x2 is not 1? How do I complete the square if f(x)=3x2+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−x2? See all questions in Completing the Square Impact of this question 3893 views around the world You can reuse this answer Creative Commons License