Question 938052
The sum of two numbers is 20: numbers x and 20-x
and their product is 15.
x(20-x) = 15
20x - x^2 = 15
x^2 - 20x + 15 = 0  Format ax^2+ bx + c
{{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}} 
x = 10 ± √85
(10+√85)^3 + (10-√85)^3  Use Calculator