The value of ((0.83)^3 - (0.1)^3) / ((0.83)^2 + 0.083 + (0.1)^2) is

Explanation

With a = 0.83 and b = 0.1, ab = 0.083. The expression is (a^3 - b^3)/(a^2 + ab + b^2) = a - b = 0.73.