Which two areas of disagreement led to sectional feeling in the united states before the civil war?

The two main areas that led to disagreement before the Civil War would include the dispute over slavery and the argument over states' rights.  

With the dispute over slavery, some states, especially in the North, believed the institution of slavery was morally wrong and wanted to stop slavery from spreading to expanding territories or areas.

That's why in the Compromise of 1850, California became a free state and slave trade was banned in Washington, D.C. because of all the support going against slavery.  

This terrible practice of slavery was talked about in books like Uncle Tom's Cabin by Harriet Beecher Stowe, and also was spoken out by famous abolitionists like Frederick Douglass and others.

People in the Southern states believed slavery was part of their lifestyle, culture, and economy, and argued that it needed to thrive to keep the South going.  

They wanted slavery to expand to territories and other states, like the argument of pushing slavery to go to Missouri.  

The South also believed that their individual state should have more power over the federal government and that they should have the right to get rid of federal laws if needed.  The South was not in favor of Abraham Lincoln keeping the country together when they were very divided on the issue of slavery as well as some government laws.

The North believed that the Union or country should stay together and that the federal government should have more power than the individual states.

After the American Revolution, and the establishment of a free United States from the colonies that had once been British property, agreement and peace did not ensue between them. There were several areas in which both the North and South states disagreed, and which eventually led to further conflict and to the endangerement of the entire nation. However, two of them stand out as the most important. The first, was, undoubtedly slavery, as it pertained to the territories that were annexed into the Union after the independence was reached, and the second, the level of involvement the federal government should have in regulating such matters as the economy and trade both between the states and with the outside world.

In the first case, slavery, the North and South differed in one essential point: the North wanted slavery to be abolished, while the South did not. The rift between the two regions was so great, and so insurmountable, that it became one of the reasons why the Civil War broke out. The real fight came because of the difference in views as to what was to be done with the territories that were starting to join the Union, whether slavery should be allowed to extend to these territories, or not. This would ensure whether the North, or the South, had the most power and control in the Union.

The second reason was the difference in views as to the level of involvement that the federal government should have in regards to regulation of commerce, state power, and especially the economy. As such, their views differed greatly on whether a Central Bank of the United States should be created, or not, whether protectionary tariffs should be set in place by the federal government, or if it was to be handled by the states, and finally, whether the federal government should be given the power to control internal improvements and thus use the nation´s taxes for such a centralized task, or if this should be given to each state independently.

The end result of these two factors, and others, led to the disastrous Civil War.

for this case we have the following equation:

we apply distributive property to the terms within parentheses.

subtracting 2 on both sides of the equation:

i really do want to but i just don't know it i'm so sorry : (