(1) INSUFFICIENT

21. - MANHATTAN TEST 2 ANSWERS
MANHATTAN TEST 2 ANSWERS

21. (1) INSUFFICIENT: If we subtract 3x from both sides and

factor out an x, we get:

x(x + 3)(x – 1) = 0, so x = -3, 0, or 1.

(2) INSUFFICIENT: This can be factored as (x – 5)(x + 3) = 0, so

x = -3 or 5.

(1) AND (2) SUFFICIENT: With the two statements together we

know x must equal -3.

The correct answer is C.