WAEC and NECO CBT App for Mobile Devices - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
Post UTME Past Questions Agent

Find the quadratic equation whose roots are \(\frac{2}{3}\) and - 1

Mathematics
WAEC 2024

Find the quadratic equation whose roots are \(\frac{2}{3}\) and - 1

  • A. 3x\(^2\) - x - 2 = 0
  • B. 3x\(^2\) + x + 2 = 0
  • C. 3x\(^2\) + x - 2 = 0
  • D. 3x\(^2\) + x - 1 = 0
Post UTME Past Questions Agent
WAEC and NECO CBT Software for Computers and Laptops - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
Your School's Whatsapp Group - Join Us now
Correct Answer: Option C
Explanation

The roots are \(\frac{2}{3}\) and - 1

Using x\(^2\) - (α + β)x +  αβ = 0

α + β =  \(\frac{2}{3}\) + (-1) =  \(\frac{2}{3}\) - 1 =  \(\frac{-1}{3}\)

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

x\(^2\) - (\(\frac{-1}{3}\) )x +  (\(\frac{-2}{3}\)) = 0

multiply through by 3

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

 


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

Contributions ({{ comment_count }})

Please wait...

{{ settings.no_comment_msg ? settings.no_comment_msg : 'There are no comments' }}

Quick Questions

Post your Contribution

Please don't post or ask to join a "Group" or "Whatsapp Group" as a comment. It will be deleted. To join or start a group, please click here

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