alleryStart learning →Completing the square relies on the principle that in solving equations you must always:
ATake a square root twice
BRemove all the constants
CDo the same to both sides
DDivide by the first term
Answer & Solution
Correct answer: C. Do the same to both sides
1. The method rests on the basic rule of equation solving.
2. Completing the square adds a chosen quantity to an equation.
3. In solving equations, we must always do the same thing to both sides.
4. So whatever is added on the left is added on the right.
_Source: OpenStax Elementary Algebra 2e (CC BY 4.0), Ch 10 'Quadratic Equations', sections 10.1-10.5_
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