If a * b = 2a – 3b + ab, then 5 * 7 + 7 * 5 is equal to:
Choose the correct choice from the following answers.
A) 34 B) 18 C) 72 D) 78 E) 82
5 * 7 + 7 * 5 = (2 * 5 – 5 * 7 + 5* 7) + (2 * 7 – 5 * 5 + 7 * 5)   = (10 + 14 – 25 + 35) = 34.   34NSWER:34
<result>A</result>
If a * b = 2a – 3b + ab, then 5 * 7 + 7 * 5 is equal to: