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Solutions of a word problem should be verified against:
AThe equation you formed
BA pocket calculator
CAnother textbook
DThe original conditions
Answer & Solution
Correct answer: D. The original conditions
1. The equation may allow a root the story forbids.
2. A negative length is one example.
3. So check against the original conditions.
_Source: NCERT Class 10 Mathematics, Chapter 4, Quadratic Equations._
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