ALGEBRA
Algebra 159 languages Article Talk Read View source View history From Wikipedia, the free encyclopedia For the kind of algebraic structure, see Algebra over a field . For other uses, see Algebra (disambiguation) . The quadratic formula expresses the solution of the equation ax 2 + bx + c = 0 , where a is not zero, in terms of its coefficients a , b and c . Algebra (from Arabic الجبر ( al-jabr ) 'reunion of broken parts, [1] bonesetting ' [2] ) is the study of variables and the rules for manipulating these variables in formulas ; [3] it is a unifying thread of almost all of mathematics. [4] Elementary algebra deals with the manipulation of variables (commonly represented by Roman letters ) as if they were numbers and is therefore essential in all applications of mathematics. Abstract algebra is the...