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Last Updated on May 10, 2023
GMAT OFFICIAL GUIDE PS
Solution:
We are given that k^2 = m^2, and we can start by simplifying the equation by taking the square root of both sides.
√k^2 = √m^2
When we take the square root of a variable squared, the result is the absolute value of that variable. Thus:
√k^2 = √m^2 is |k| = |m|
Note that answer choices A through D could all be true, but each of them would be true only under specific circumstances. Answer choice E is the only one that is universally true.
Answer: E
