For this case we have the following expression:
[tex]6a-5b[/tex]
We must evaluate the expression when:
[tex]a = -3\\b = 4[/tex]
Then, replacing the values we have:[tex]6 (-3) -5 (4)[/tex]
Taking into account that according to the law of the signs of multiplication, it is fulfilled that:
[tex]+ * - = -[/tex]
So:
[tex]-18-20 =[/tex]
Equal signs are added and the same sign is placed:
-38
Answer:
-38
