SAT Math Multiple Choice Question 943: Answer and Explanation
11. Which of the following is equivalent to?
Correct Answer: B
Category: Additional Topics in Math / Imaginary Numbers
Strategic Advice: The rules of algebra still apply when working with imaginary numbers; as you work, be careful of negative signs when distributing and combining like terms.
Getting to the Answer: Start by distributing the negative sign to the expression in the second set of parentheses to get. Combining like terms yields, which matches (B).