Solve the Derivative of x² - 6x & Find the Hidden Number! ✨

Find the derivative of x^2 - 6x.Then susbtitute the numbers in the poem in for x and solve to find your new answer. Place the new number in the common alphabet code to solve the poem. 13-7-5.5-15.5 12.5-3.5-15.5 13-7-305-13 9-10.5-14-5.5 13-3.5-8.5-5.5-12.5 3.5 9-10.5-13 10.5-6 14.5-10.5-12-8.5. 13-7-3.5-13 9.5-13.5-12.5-13 4-5.5 <br />13-12-13.5-5.5, 12.5-7.5-10-4.5-5.5 7.5 9.5-3.5-5-5.5 15.5-10.5-13.5 6.5-10.5 13-7-12-10.5-13.5-6.5-7 3.5-9-9 13-7-7.5-12.5 14.5-10.5-12-8.5 8-13.5-12.5-13 13-10.5 13-5.5-9-9 15.5-10.5-13.5 13-7-3.5-13 7.5 9-10.5-14-5.5 15.5-10.5-13.5!<br /><br />Karen Marie Haas<br /><br />http://www.poemhunter.com/poem/mathematical-poem/