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Mark for Review

Which of the following is equivalent to 3a3 - 5a3 + 6a?

A

B

C

D


Correct Answer: A

Your Answer:

Explanation

A

The question asks for an equivalent form of an expression. Use bite-sized pieces and the Process of Elimination to tackle this question. The only term with a single a is 6a, so it cannot be combined with any other terms and must appear in the correct answer. Eliminate (B) and (C) because they do not include 6a. Combine the two terms with a3 to get 3a3 - 5a3 = -2a3. Eliminate (D) because it does not include -2a3. The correct answer is (A).