Zeroes of a PolynomialA polynomial is an algebraic expression consisting of variables and coefficients, which involves only the operations of addition, subtraction, multiplication, and non-negative integer exponents of variables. The zeroes of a polynomial are the values of the variable that make the polynomial equal to zero.
Example: Consider the polynomial p(x) = x^2 - 3x - 10. To find the zeroes of the polynomial, we set p(x) = 0 and solve for x.
x^2 - 3x - 10 = 0
Factorizing the polynomial, we get:
(x - 5)(x + 2) = 0
Therefore, the zeroes of the polynomial are x = 5 and x = -2.
Importance of finding zeroes of a polynomialFinding the zeroes of a polynomial is an important aspect of algebra because it helps in the solution of equations and in the study of functions. It is used in various fields of science and engineering such as physics, chemistry, and economics.
The zeroes of a polynomial can provide important information about the polynomial, such as its degree, its behavior near the zeroes, and its graph.
For example, if a polynomial has a zero at x = a, then (x - a) is a factor of the polynomial. This property can be used to factorize the polynomial and find other zeroes.
The number of zeroes of a polynomial in a given interval can also be determined using the Intermediate Value Theorem.
Overall, finding the zeroes of a polynomial is an important tool in algebra and is used in various fields of science and engineering.