Question

The cost of one pen is given by the expression 2x2−x−10/x2−x−6.

The cost of one pen is undefined when x =

Answer 1

@iGreen

Answer 2

@TheSmartOne

Answer 3

@AnswerMyQuestions

Answer 4

The cost of one pen is undefined when x =

Answer 5

3 and -2
-3 and 2
3

Answer 6

in order for the rational function to be undefined, the denominator should be equal to zero.

therefore, you have to solve for the zeros/solutions of the functions denominator.
but before that, you have to simplify the rational function first...
if there's a common factor between the numerator and denominator, then that factor will give a hole in the function's graph and the remaining factor in the denominator will be the asymptote.