Free Study Material For RRB Examination: Mathematics (Basic Algebra)
Free Study Material For RRB Examination
Subject : Mathematics (Basic Algebra)
A Civil Servant should be well-versed in basics of Algebra. In the Civil Services Aptitude Test Paper 2, in Basic Numeracy, certainly there will be asked some questions based on equations and their roots.
Polynomials
Polynomial
An expression in term of some variable(s) is called a polynomial.
For example
f(x) = 2x – 5 is a polynomial in variable x
g(y) = 5y2 – 3y + 4 is a polynomial in variable y
For example
f(x) = 3x – 7 is a binomial as it contains two terms.
g(y) = 8y is a monomial as it contains only one terms.
Quadratic Polynomials
A polynomial of degree two is called a quadratic polynomials. In
general f(x) = ax2 + bx + c, where
a ¹ 0 is a quadratic polynomial.
For example
f(x) = x2 – 7x + 8 is a trinomial as it contains 3 terms
g(y) = 5x2 – 2x is a binomial as it contains 2 terms
p(u) = 9x2 is a monomial as it contains only 1 term
