Question

State any restrictions on the variables.

4-x / x^2-16

(Points : 4)
x ≠ –4 and x ≠ 4
x ≠ –4
x ≠ 4
no restrictions are needed

Answer 1

the denominator cannot be zero

Answer 2

solve \[x^2-16=0\\x^2=16\\x=\pm 4\]