Real numbers

[greenwich]

For which real numbers x is the expression 2/((x-2)(x+1)) not defined?

(A) x=0 only
(B) x=2 only
(C) x=-1 only
(D) x=-1 or 2
(E)x=-1, 0 or 2

Sorry - wrong forum

[killerdrummer]

D as denominator becomes ZERO and anyhting/zero is undefined.