Mathematics is an equally important section for RRB Stage II exam and has an even more abundant importance in some other exams conducted by RRB & SSC. Generally, there are questions asked related to basic concepts and formulas of Quadratic Equations.

To let you make the most of Mathematics section,

**we are providing important facts related to Quadratic Equations**.**We wish you all the best of luck to come over the fear of Mathematics section.***Also, Railway Exam Stage II is nearby with bunches of posts for the interested candidates in which Mathematics is a major part. We have covered important notes and questions focusing on these prestigious exams.*

**Quadratic Equations****Quadratic Equations**

An algebraic expression of the form: ax² + bx + c = 0, where a ≠ 0, b, c ∈ R is called a quadratic equation.

**Roots of the Quadratic Equation:**

A root of the quadratic equation ax² + bc + c = 0 is a number α (real or complex) such that a a²+ba+c=0 then (x-a) is factor of ax²+bx+c. The roots of the quadratic equation are

x=(-b±√(b²-4ac))/2a

**Nature of Roots:**

The value of x at which value of equation will be zero.

Roots are imaginary: b² – 4ac ≤ 0

Roots are real: b² – 4ac ≥ 0

**Sum & product of root:**

Let there are two roots named α & β, then

a=(-b+√(b²-4ac))/2a & β=(-b-√(b²-4ac))/2a

Sum of root: α + β = (-b)/a

Product of root: αβ = c/a

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