If (2x - 1)2 = 100, then which one of the following could equal x?

A - 11/2

B - 9/2

C 11/2

D 13/2

Solution

Correct Answer: Option C

  (2x - 1)2 = 100
⇒ 2x - 1 = √100
⇒ 2x - 1 = 10
⇒ 2x = 11
   x = 11/2

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