Final answer:
After substituting the values a = -4, b = 6, and c = -9 into the expression ac/b + 2b/a, we find that the result simplifies to 3.
Step-by-step explanation:
The student asked us to evaluate the expression ac/b + 2b/a for given values of a, b, and c. We have been given a = -4, b = 6, and c = -9. Let's substitute the values into the expression:
a = -4, b = 6, c = -9
Substituting these values, the expression becomes:
(-4)(-9)/6 + 2(6)/(-4)
=(36/6) + (12/-4)
=(6) + (-3)
Therefore, ac/b + 2b/a = 3 when a = -4, b = 6, and c = -9.