Question

For which values of x will the rational expression below be undefined (x-3)(x+6)/x+7

Answer 1

E. -7

Explanation:

`((x-3)(x+6))/(x+7)` Substitute x for -7

`((-7-3)(-7+6))/(-7+7)` Simplify

`((-10)(-1))/(0)` Multiply

`(10)/(0)` This is undefined because you can't divide any number by 0.