joleiswan6250 joleiswan6250 14-02-2024 Physics contestada Let vector a and b be unit vectors such that vector|a + b| = 3. Then the value of (2a + 5b).(3a + b + a x b) is equal to (A) 11/2 (B) 13/2 (C) 39/2 (D) 23/2