# The Uses of Polynomials

••• Jupiterimages/Photos.com/Getty Images
Print

Polynomials are a type of math equation that multiplies, adds or subtracts a changing number, called an unknown, by an unchanging number, called a constant. For example, in the polynomial equation y = 3x, 3 is the constant and "x" is the unknown. In this case, to determine the “y-value” for any chosen “x” value, you multiply the chosen value by 3. So, if you choose an x-value of "5," then the y-value is 3*5 = 15.

## Higher-Level Math Classes ••• Jupiterimages/BananaStock/Getty Images

Polynomials have implications to all higher-level mathematics courses. They serve as an important tool for factoring trigonometric functions, and make up the basis of the power rule in differential calculus. Mathematicians draw on different types of polynomial series to calculate slopes and mathematical approximations. Without a substantial knowledge of polynomial theory, success in any higher-level mathematics class would be very difficult.

## Parabolas ••• Jupiterimages/Photos.com/Getty Images

The “x” and “y” values of a polynomial make a point on a graph. In the “x^2” polynomial, you find the y-value by squaring the chosen x-value. For example, if the chosen x-value is “2,” then the y-value is 2^2 = 2*2 = 4. When you draw all "x" and "y" values of the x^2 polynomial on a graph, you get a “U-shaped” image called a parabola. Parabolas show up in many of the devices around us, including parabolic microphones, satellite dishes and car headlights.

## Fields of Industry

Polynomials have relevance to nearly all the sciences. Astrophysicists use them to calculate a star's velocity and distance from another object in space. Likewise, they are important in determining pressure in applications of fluid dynamics. Chemists use polynomials to determine the composition of certain compounds and molecules, and they are central to statistics. Statistical formulas use polynomials to ascertain future values of animal birth and death rates, monetary flow and population growth.

## Computers ••• Jupiterimages/Photos.com/Getty Images

In the last 30 years, computer scientists have instituted important uses for polynomials. Most of their work involves locating specific targets via coordinate systems and cryptography. Polynomials are also important to travel. According to the website MathMotivation, “Without the Taylor Polynomial or other polynomial approximation, there would be no way for scientific calculators and computers to perform the calculations needed to guide our spaceships and aircraft.”