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Simplify \(\frac{324 - 4x^2}{2x + 18}\) 

Mathematics
JAMB 2020

Simplify \(\frac{324 - 4x^2}{2x + 18}\) 

  • A. 2(x - 9)
  • B. 2(9 + x)
  • C. 81 - x\(^2\)
  • D. -2(x - 9)
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Correct Answer: Option D
Explanation

234 - 4x\(^2\) = 18\(^2\) - (2x)\(^2\) = (18 - 2x)(18 + 2x)

2x + 18 = 2x + 18 = (2x + 18)

18 - 2x = 2(9 - x) or -2(x - 9) 

 

There is an explanation video available below.


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Explanation Video

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