SAT Math Multiple Choice Question 302: Answer and Explanation
2. Which of the following is equivalent to the expression above, given that x ≠ -5 ?
- A. 2x
- D. 2x + 4
Correct Answer: A
Category: Passport to Advanced Math / Exponents
Strategic Advice: To divide one rational expression by another, multiply the first expression by the reciprocal (the flip) of the second expression.
Getting to the Answer: Rewrite the division as multiplication, factor any factorable expressions, and then simplify if possible.
Note that the question also states that x ≠ -5. This doesn't affect your answer-it is simply stated because the denominators of rational expressions cannot equal 0.