PSAT Math Multiple-Choice Practice Question 237

Correct Answer: B

Explanation:

B

Difficulty: Medium

Category: Passport to Advanced Math/Quadratics

Getting to the Answer: Notice the structure of the equation. The expression on the left side of the equation is the square of a quantity, so start by taking the square root of both sides. After taking the square roots, solve the resulting equations. Remember, 4² = 16 and (- 4)² = 16, so there will be two equations to solve:

Choice (B) is correct.