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

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Mathematics WAEC 1995

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

  • -3,2
  • -2,3
  • -2,9
  • -9,2/3 checkmark
  • 2/3, 9.

The correct answer is: 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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