( a - b )¹° = a¹° + ¹°C₁a⁹( - b ) + ¹°C₂a⁸( - b )² + ................ => ( a - b )¹° = a¹° - 10 a⁹b + 45 a⁸ b² - .................... The First Three terms are = a¹° - 10 a⁹b + 45 a⁸ b² ...............
