Algebra is the part of mathematics in which letters and other symbols are used to represent numbers in expressions, formulas, equations, and inequalities. The plural of formula is sometimes written as ...

For ax 2 + bx + c = 0, (α, β) = [–b ± √(b 2 – 4ac)]/2ac, where α and β are the roots of the equation. Sum of roots = –b/a Product of roots = c/a If roots of a quadratic equation are given, then the ...