Which expression is equivalent to (7x 3 + 7x) − (6x 3 − 3x)?

Question

Accepted Answer

Choice A is correct. Applying the distributive property, the given expression can be written as 7x 3 + 7x − 6x 3 + 3x. Grouping like terms in this expression yields (7x 3 − 6x 3 ) + (7x + 3x). Combining like terms in this expression yields x 3 + 10x. Choice B is incorrect and may result from conceptual or calculation errors. Choice C is incorrect and may result from conceptual or calculation errors. Choice D is incorrect and may result from conceptual or calculation errors.

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