Question which-
Which expression is equivalent to ?
Which expression is equivalent to 9 x 2 + 7 x 2 + 9 x ?
Medium-difficulty · SAT Math · Equivalent Expressions — Simplifying polynomials. Read the question above, select your answer, and check the full explanation below to understand exactly why the correct choice works.
Answer explanation
Choice D is correct. In the given expression, the first two terms, and , are like terms. Combining these like terms yields , or . It follows that the expression is equivalent to .
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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