Cody

Problem 1954. Write a cubic formula function

Create a function that will output the three roots of a cubic equation specified by the 4 coefficients listed as input. The output should be sorted using the "sort" function of matlab, to be consistent. Also, the output need only be accurate to the 4th decimal place, and the input "A" will always be non-zero and real.

Example:

A*x^3+B*x^2+C*x+D=0 --> [A,B,C,D]

x^3-6x^2+11x-6=0 --> [1,-6,11,-6]

cubicFormula([1,-6,11,-6]) --> [1,2,3]

Solution Stats

12.2% Correct | 87.8% Incorrect
Last solution submitted on Mar 17, 2019

Problem Comments