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A quadratic will not factor neatly and completing the square looks messy. The reliable method left is the:
AMidpoint formula
BDistance formula
CSlope formula
DQuadratic formula
Answer & Solution
Correct answer: D. Quadratic formula
1. It works for every quadratic.
2. The coefficients go straight in.
3. It is the quadratic formula.
_Source: OpenStax College Algebra 2e, Chapter 2, Equations and Inequalities._
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