3
Answer: ASet 2: Polynomial Functions (Advanced)
Explanation
PROBLEM
Subtract: (9x + 9) - (2x + 2). What is the coefficient of x in the result?
Subtract: (9x + 9) - (2x + 2). What is the coefficient of x in the result?
A.✓ Correct
7
B.
14
C.
8
D.
5
Detailed Explanation
Choice A is the best answer. (9x + 9) - (2x + 2) = 7x + 7. Coefficient of x is 7.
Why others are wrong:
B: 14 is incorrect because it does not satisfy the equation.
C: 8 is incorrect because it does not satisfy the equation.
D: 5 is incorrect because it does not satisfy the equation.