The Official SAT Question of the Day™

Read the following SAT test question, then click on a button to select your answer.

If = , which of the following must be true?

A. a = 0
B. b = 0
C. a + b = 0
D. a – b = 0
E. a^2 + b^2 = 0

Answer is C

Here's Why:

Squaring both sides of the equation = gives the equation x – a = x + b. Subtracting x from both sides now gives –a = b, or a + b = 0.


Difficulty: Medium
Question Type: Standard Multiple Choice

(Mathematics)