If x² − 9 = 0, then x =
A±9
B3 only
C−3 only
D±3
Answer & Solution
Correct answer: D. ±3
1. x² = 9.
2. x = ±√9 = ±3.
_Source: TSICET 2024 PYQ Q.96 (Shift 1, Quadratics)_
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