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.
How Long Does It Last? Most cases of acute bronchitis last between 3 and 10 days. However, the cough can linger for several weeks, even after the infection that caused it is gone. If your cough lasts for more than a month to six weeks after diagnosis, contact your health care provider. If your symptoms improve and then come back worse or different than before, you may have developed another infection and should seek medical attention again. Symptoms of Acute Bronchitis. Symptoms of acute bronchitis include: Cough - often productive, meaning you cough up mucus. Wheezing. Chest pain or discomfort. Low grade fever. Shortness of breath.