Question

What is the sum of the two values which will make the following expression undefined?
(x-3)/(2x^2-8x+9)

Answer 1

Did you factor the denominator?

Answer 2

I've tried but it wont work is there another method to find out?

Answer 3

Check to make sure you have copied it right. It is not factorable over the set of real numbers.

Answer 4

Maybe it is x^2 and not 2x^2

Answer 5

Its copied exactly

Answer 6

\[(x-3)/(2x^2-8x+9)\]

Answer 7

Use the sum of the roots formula for a quadratic equation. That would be the desired answer.

Answer 8

Sum of roots = -b/a

Answer 9

In this case: 8/2=4