Is 2x - 3y < x2 ?
(1) 2x - 3y = -2
(2) x > 2 and y > 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.
条件1,任何数的平方大于等于0,-2当然是小于的
注意:条件2是可以的
Is 2x - 3y < x2 ?
(1) 2x - 3y = -2
(2) x > 2 and y > 0.=》x2肯定大于2x,3y又肯定大于0,所以2x-3y肯定小于x2呀