Answer:
I think the answer is 1/42
If you are talking about building blocks, then you would get one 10 and 3 ones, then subtract that from 7 ones and would get 6
A
substitute x = 3h into f(x)
f(3h) = 2(3h)² + 3(3h) - 4 = (2 × 9h²) + 9h - 4 = 18h² + 9h - 4