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Advanced Math / Equivalent expressions Difficulty: Easy

Which expression is equivalent to $19 left parenthesis x squared minus 7 right parenthesis$ ?

$19 x squared minus 133$

$19 x squared minus 26$

$19 x squared minus 7$

$19 x squared plus 12$

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Explanation

Choice A is correct. The expression $19 left parenthesis x squared minus 7 right parenthesis$ can be rewritten as $19 left parenthesis x squared right parenthesis minus 19 left parenthesis 7 right parenthesis$ , which is equivalent to $19 x squared minus 133$ .

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.