Question

What value is a discontinuity of x squared plus 2 x plus 3, all over x squared minus x minus 12?

Answer 1

A x = -1
B x = -2
C x = -3
D x = -4

Answer 2

?

Answer 3

Hint:
For a rational function, discontinuity occurs at locations where the denominator equals zero:
\(\large f(x)=\frac{x^2+2x+3}{x^2-x-12}=\frac{x^2+2x+3}{(x-4)(x+3)}\)
The denominator has been factorized to help you.
All you need to do is to determine at which points the denominator becomes zero.
(note: the answer choices include only one of the two values).