Medical Definition of BIPOLAR DISORDER. : any of several mood disorders characterized usually by alternating episodes of depression and mania or by episodes of depression alternating with mild nonpsychotic excitementâcalled also bipolar affective disorder, bipolar illness, manic depression, manic-depressive illness, manic-depressive psychosis; ....efinition of BIPOLAR DISORDER. : any of several psychological disorders of mood characterized usually by alternating episodes of depression and mania âcalled also manic depression, manic-depressive illness.
Algebra is a powerful and rich branch of mathematics that is useful in everyday life as well as business, engineering, and other technical fields.
Two key features of algebra as we understand the word today are: 1. Reasoning about numbers by recognizing patterns across numbers; 2. Solving a problem by introducing a term for an unknown and then, starting with what is known, reasoning to determine its value. We first see the emergence of both features of algebra in the mathematics of ancient Babylonia, around 2,000 BCE. Several hundred of the many thousands of Babylonianâs cuneiform-inscribed clay tablets that have been found are devoted to mathematics.