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Solve the equation 3x\(^2\) + 25x -18 = 0

Mathematics
WAEC 1995

Solve the equation 3x\(^2\) + 25x -18 = 0

  • A. -3,2
  • B. -2,3
  • C. -2,9
  • D. -9,2/3
  • E. 2/3, 9.
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Correct Answer: Option D
Explanation

3x\(^2\) + 25x - 18 = 0

3x\(^2\) + 27x - 2x - 18 = 0

3x(x + 9) - 2(x + 9) = 0

(3x - 2)(x + 9) = 0

x = \(\frac{2}{3}\) or x = -9.

 


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