is ab positive?

[ST]

If b is positive. Is ab positive?

1. a^2 * b > 0
2. a^2 + b = 13

answer is e

[aj5105]

S1: a^2 * b > 0

We know b is positive. a can be -ve or +ve. (Square of a -ve or +ve number is always positive.)

Insufficient.


S2 : a^2 + b = 13

We know b is positive. a can be -ve or +ve.

Insufficient.


(1) + (2)

Insufficient.

(E)