The statement which best describes Gary’s error is; Gary did not use the greatest common factor in the equation.
This is the largest positive integer or polynomial that is a divisor of several different numbers. For instance, the greatest common divisor of 66, 30 and 18 is 6.
Gary's work:
66 + 36
Factors of 66: 1, 2, 3, 6, 11, 22, 33, 66
Factors of 36: 1, 2, 3, 4, 6, 9, 12, 18, 36
66 + 36
= 3 (22 + 12)
Gary did not use the greatest common factor in the equation.
The correct answer:
66 + 36
= 6(11 + 6)
Therefore, Gary did not use the greatest common factor in the equation.
Learn more about greatest common factor:
https://brainly.com/question/219464
#SPJ1