The expression is equivalent to for some constant a. What is the value of a ?
A
2
B
3
C
4
D
7
Correct answer: D
Explanation
Choice D is correct. It’s given that is equivalent to for some constant a. Distributing the x over each term in the parentheses gives , which is in the same form as the first given expression, . The coefficient of the second term in is 7. Therefore, the value of a is 7.
Choice A is incorrect. If the value of a were 2, then would be equivalent to , which isn’t equivalent to . Choice B is incorrect. If the value of a were 3, then would be equivalent to , which isn’t equivalent to . Choice C is incorrect. If the value of a were 4, then would be equivalent to , which isn’t equivalent to .
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id cb_question_bank:6c79e6ef-f147-40df-9047-2036943b35cd · question 49efde89 · IBN 022215-DC
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