Roots of Equation | PRMO 2017 | Question 19

Join Trial or Access Free Resources

Try this beautiful problem from the Pre-RMO, 2017 based on roots of equation.

Roots of equation - PRMO 2017


Suppose 1,2,3 are roots of the equation \(x^{4}+ax^{2}+bx=c\). Find the value of c.

  • is 107
  • is 36
  • is 840
  • cannot be determined from the given information

Key Concepts


Roots

Equations

Algebra

Check the Answer


Answer: is 36.

PRMO, 2017, Question 19

Higher Algebra by Hall and Knight

Try with Hints


1,2,3 are the roots of \(x^{4}+ax^{2}+bx-c=0\)

since sum of roots=0 fourth root=-6 by using Vieta's formula

c=36.

Subscribe to Cheenta at Youtube


More Posts

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.

linkedin facebook pinterest youtube rss twitter instagram facebook-blank rss-blank linkedin-blank pinterest youtube twitter instagram