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.
5.5 million people are treated for the condition. On average, three people per day or one person every eight hours dies from asthma. An estimated 75% of hospital admissions for asthma are avoidable and 90% of deaths are preventable. One in 11 children and one in 12 adults has asthma. It is more common in women than men. The NHS spends around Â£1 billion a year treating and caring for people with asthma.