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.
Introduction. Asthma is a common long-term condition that can cause coughing, wheezing, chest tightness and breathlessness. The severity of these symptoms varies from person to person. Asthma can be controlled well in most people most of the time, although some people may have more persistent problems. Occasionally, asthma symptoms can get gradually or suddenly worse. This is known as an asthma attack, although doctors sometimes use the term exacerbation.