Which expression is equivalent to 2 x 2 + x - 9 + x 2 + 6 x + 1

Question

Which expression is equivalent to 2 x 2 + x - 9 + x 2 + 6 x + 1 ?

Accepted Answer

Choice D is correct. The given expression is equivalent to 2 x 2 + x + - 9 + x 2 + 6 x + 1 , which can be rewritten as 2 x 2 + x 2 + x + 6 x + - 9 + 1 . Adding like terms in this expression yields 3 x 2 + 7 x + - 8 , or 3 x 2 + 7 x - 8 . Choice A is incorrect and may result from conceptual or calculation errors. Choice B is incorrect and may result from conceptual or calculation errors. Choice C is incorrect and may result from conceptual or calculation errors.

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