Ledijoygo Ledijoygo Math Answered 3. Add: (3x + 4xy + 4y). (5x + 6xy + 6y?) and (6x² + 5xy + 8y?)A. 14x + 15xy - 18y?B. 14x15xy + 18yC. 14x² - 15xy - 18yD. 14x. 15xy - 18y