Loading [MathJax]/jax/output/SVG/jax.js
 
+0  
 
+1
471
1
avatar+501 

What is the sum of all values of y for which the expression y+6y25y+4 is undefined?

 Feb 17, 2021
 #1
avatar
-1

The expression (y + 6)/(y^2 - 5y + 4) is undefined when y^2 - 5y + 4 = 0.  By the quadratic formula, the roots are 3 - sqrt(5) and 3 + sqrt(5), and their sum is 6.

 Feb 17, 2021

2 Online Users

avatar