Question the-ex
The expression above is equivalent to 
, where a, b, and c are constants. What is the value of b?
The expression above is equivalent to , where a , b , and c are constants.
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
The correct answer is 
. The expression can be written in the form , where a, b, and c are constants, by multiplying out the expression using the distributive property of multipliion over addition. The result is 
. This expression can be rewritten by multiplying as indied to give 
, which can be simplified to 
, or 
. This is in the form , where the value of b is . Note that 5/2 and 2.5 are examples of ways to enter a correct answer.
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