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
(A) x=0 only
(B) x=2 only
(C) x=-1 only
(D) x=-1 or 2
(E)x=-1, 0 or 2
Any value for x that makes the denominator 0 will make the expression 2/((x-2)(x+1)) UNDEFINED
So if x = 2, the term (x-2) will become 0 or if x = -1, then term (x+1) will become zero. In either case, the denominator will reduce to 0
Ans D
