Sari applied the distributive property using the greatest common factor to determine the expression that is equivalent to 84 + 40. her work is shown below. factors of 84: 1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84 factors of 40: 1, 2, 4, 5, 8, 10, 20, 40 84 + 40 = 2(42 + 20) what statement best describes sari’s error?