alleryFind x such that the distance from (x, 1) to (2, 3) is √8.
A−1 or 5
B1 or 3
C0 or 4
D2 or 6
Answer & Solution
Correct answer: C. 0 or 4
√[(x − 2)² + (1 − 3)²] = √8 ⇒ (x − 2)² + 4 = 8 ⇒ (x − 2)² = 4 ⇒ x − 2 = ±2 ⇒ x = 0 or 4.
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