if a * b = 2a – 3b + ab, then 3 * 5 + 5 * 3 is equal to :
Select the correct option:
A) 22
B) 24
C) 26
D) 28
E) 29
Solution   3 × 5 + 5 ×3 = (2 ×3 - 3 × 5 + 3 × 5) + 2 (2 × 5 - 3 × 3 +5 × 3)   = (6 + 10 - 9 + 15)= 
<gadget id="calculator">(6 + 10 - 9 + 15)</gadget>
<output>22</output>
22.   22nswer 22
<result>A</result>
if a * b = 2a – 3b + ab, then 3 * 5 + 5 * 3 is equal to :