Question : If (x – 8)2 – (x + 8)2 = 0. What is the value of x?
Option 1: 1
Option 2: 32
Option 3: 0
Option 4: –32
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Correct Answer: 0
Solution : (x – 8) 2 – (x + 8) 2 = 0 ⇒ (x – 8 + x + 8)(x – 8 – x – 8) = 0 ⇒ (2x)(– 16) = 0 ⇒ x = 0 Hence, the correct answer is 0.
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