Question 16
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The square of a positive number exceeds 4 times the number by 45. What is the number?
- A 5
- B 15
- C 11
- D 9 Correct
Correct Answer: Option D
x² − 4x = 45
x² − 4x − 45 = 0
(x − 9)(x + 5) = 0
x = 9
Answer: 9
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