Question

1. What domain restrictions apply to this rational expression? show work
x2 +10x+9/
x2-9

Answer 1

9514 1404 393

Answer:

x ≠ -3, x ≠ 3

Explanation:

As with any rational function, the denominator cannot be zero. Here that means we cannot have x such that ...

x² -9 = 0

(x -3)(x +3) = 0

x = 3 or -3 . . . . . . . values not allowed in the domain