Question

Which of the following is the simplified form of the quantity x squared minus 16 over the quantity x plus 4 ?

x + 4, with the restriction x ≠ 4

x – 4, with the restriction x ≠ 4

x + 4, with the restriction x ≠ –4

x – 4, with the restriction x ≠ –4

Answer 1

with the denominator being x+4, the restriction is pretty obvious... (HINT: denominator cannot be zero).

then factor the numerator \(\large x^2-16 \) and cancell the common factor from top and bottom..

Answer 2

is it x + 4 restriction x = -4?