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An equation reads x squared equals 49. The quickest route to both answers is:
ARough guessing
BSquare root rule
CLong division
DInterval notes
Answer & Solution
Correct answer: B. Square root rule
1. The square sits alone on one side.
2. Take roots of both sides, keeping both signs.
3. It is the square root rule.
_Source: OpenStax College Algebra 2e, Chapter 2, Equations and Inequalities._
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