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Advanced Math / Equivalent expressions Difficulty: Easy

Which expression is equivalent to $parenthesis, 2 x squared minus 4, close parenthesis, minus, parenthesis, negative 3 x squared, plus 2 x, minus 7, close parenthesis$ ?

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Explanation

Choice A is correct. The given expression $open parenthesis, 2 x squared, minus 4, close parenthesis, minus, open parenthesis, negative 3, x squared, plus 2 x, minus 7, close parenthesis$ can be rewritten as $2 x squared, minus 4, plus 3 x squared, minus 2 x, plus 7$ . Combining like terms yields $5 x squared, minus 2 x, plus 3$ .

Choices B, C, and D are incorrect and may be the result of errors when applying the distributive property.