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Solve the following equation: 6x\(^2\) - 7x - 5 = 0

Mathematics
WAEC 1989

Solve the following equation: 6x\(^2\) - 7x - 5 = 0

  • A. x = 1/2 or x = -21/2
  • B. x = 1/3 or x = 21/2
  • C. x = 1 2/3 or x = -1/2
  • D. x = 12/3 or x = 1/2
  • E. x = 5/6 or x = -1
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Correct Answer: Option C
Explanation

6x\(^2\) - 7x - 5 = 0

6x\(^2\) - 10x + 3x - 5 = 0

2x(3x - 5) + 1(3x - 5) = 0

(2x + 1)(3x - 5) = 0

x = \(\frac{5}{3}\) or x = \(-\frac{1}{2}\)

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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC and NECO CBT App for Mobile Devices - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
Your School's Whatsapp Group - Join Us now
WAEC and NECO CBT Software for Computers and Laptops - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
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Post UTME Past Questions Agent
WAEC and NECO CBT Software for Computers and Laptops - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
WAEC and NECO CBT App for Mobile Devices - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now