For which set of values of X is the algebraic expression x^2 - 16 over x^2 -4x - 12 undefined.

Step-by-step explanation:

In order to be undefined, the fraction must have the denominator equal to 0, therefore we need to solve the equation

This is a second degree equation, and we can re-write it to

We notice that the solution to be composed of 2 values:

x = 6

and

x = -2

Therefore the set of values of x for which the said expression is undefined is

S={-2, 6}

Alternatively, if you don't notice how to re-write it factored, you can use the 2nd degree equation solving algorithm:

step-by-step explanation:

first you will have to convert 3/4 into a decimal

which is .75

then you will have to divide 1.5 by .75

which is 2

no you have to divide