Question

If a * b = 2a – 3b + ab, then 5 * 7 + 7 * 5 is equal to:
a. 33
b. 36
c. 34
d. 38

Answer 1

a*b=2a-3b+ab

5*7=2(5)-3(7)+35=10-21+35=24

7*5=2(7)-3(5)+35=14-15+35=34

then 5*7+7*5=24+34=58

hope it helps✌