2/x +x 3 -2 = 2x -1 +x 3 -2. The first one isn't polynomial as it has a negative exponent and all exponents in a polynomial must be positive. To illustrate why the second one isn't a polynomial rewrite it a little.
The duration of an asthma attack can vary, depending on what caused it and how long the airways have been inflamed. Mild episodes may last only a few minutes; more severe ones can last from hours to days.Mild attacks can resolve spontaneously or may require medication, typically a quick-acting inhaler.More severe attacks can be shortened with appropriate treatment.ild episodes may last only a few minutes; more severe ones can last from hours to days. Mild attacks can resolve spontaneously or may require medication, typically a quick-acting inhaler. More severe attacks can be shortened with appropriate treatment.
So How long does a heart attack last? It is different from one person to the other in terms of symptoms. Normally the warning signs of a heart attack could last from 15-20 minutes to several hours and the only way to make sure that it is a heart attack is to get tested.he condition called the Heart attack takes place when the adequate amount of oxygen is not received by the muscles of the heart. How long does a heart attack last depends on the following: to function well the heart muscles are in constant need of oxygenated blood.