Question which-
Which of the following is equivalent to the expression above?
Which of the following is equivalent to the expression above?
Hard-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 A is correct. By distributing the minus sign through the expression 
, the given expression can be rewritten as 
, which is equivalent to 
. Combining like terms gives 
, or 
.
Choice B is incorrect and may be the result of failing to distribute the minus sign appropriately through the second term and simplifying the expression 
. Choice C is incorrect and may be the result of multiplying the expressions 
and 
. Choice D is incorrect and may be the result of multiplying the expressions and 
.
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