What is the value of 5x2 + 4x - 1 ?
(1) x(x + 2) = 0
(2) x = 0
Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
EACH statement ALONE is sufficient.
Statements (1) and (2) TOGETHER are NOT sufficient.
不理解 得出两种可能值就不算是得到算式得值了嘛?
不能有"或"答案吗?