# Adding and Subtracting Polynomials

## Online Tutoring Is The Easiest, Most Cost-Effective Way For Students To Get The Help They Need Whenever They Need It.

#### SIGN UP FOR A FREE TRIAL

A polynomial is an expression of power n where n= 0, 1, 2, 3… n
Where n is a positive integer.

Degree of a polynomial in one variable: -

In case of a polynomial in one variable, the highest power of the variable is called the degree of polynomial.

Polynomial of various degrees

♦ Linear polynomial: - a polynomial of degree 1 is called a linear polynomial.
♦ Quadratic polynomial: - A polynomial of degree 2 is called a quadratic polynomial.
♦ Cubic polynomial: - A polynomial of degree 3 is called a cubic polynomial.
♦ Biquadratic polynomial: - A polynomial of degree 4 is called a biquadratic polynomial.

Number of terms in a polynomial: -

♦ Monomial: - A polynomial containing one nonzero term is called a monomial.
♦ Binomial: - A polynomial containing two nonzero terms is called a binomial.
♦ Trinomial: - A polynomial containing three nonzero terms is called a trinomial.

Example of adding and subtracting polynomials: -

Question1: - Add the following polynomials
y^4 + 2y^2 + 3y + 5 and 5y^4 + 4y^3 + 3y^2 + 5y

Solution: -
(y^4 + 2y^2 + 3y + 5) + (5y^4 + 4y^3 + 3y^2 + 5y)
=(y^4 + 5y^4) + 4y^3 + (2y^2 + 3y^2) + (3y + 5y) + 5
=6y^4 + 4y^3 + 5y^2 + 8y + 5

Question2: - Subtract the following polynomials:
Z^3 + 2z + 1 and z^2 + 3z + 5

Solution: -
(z^3 + 2z + 1) - (z^2 + 3z + 5)
=z^3 + 2z + 1 – z^2 -3z -5
=z^3 – z^2 –z -4