15) What is the leading coefficient of -2(x-1)^2(x+4)(2x-1)? ​

true? is that what you're asking or do you mean something else?

the entire expression should be subtracted from 30. to subtract the quantity, distribute the negative sign, which changes the signs on the terms. so, the –2 changes to positive and gets added to 30 instead of subtracted from it.

hope this ! ^w^