A non-constant polynomial function is a function that can be expressed as a sum of terms, each of which is a constant multiplied by a power of the independent variable. In other words, it is a function that is not a constant and can be written in the form f(x) = a_nx^n + a_{n-1}x^{n-1} + ... + a_1x + a_0, where n is a non-negative integer, a_n is not equal to 0, and a_0, a_1, ..., a_n are constants. Non-constant polynomial functions can have various shapes and degrees, and their graphs can exhibit different behaviors such as turning points, local maxima or minima, and inflection points. **

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The fact that non-real roots of a polynomial always occur in conjugate pairs is a consequence of the complex conjugate root theorem. This theorem states that if a polynomial with real coefficients has a non-real root, then its complex conjugate is also a root of the polynomial. This means that if the polynomial has a root of the form a + bi, then its conjugate root is a - bi. This property arises from the fact that the coefficients of the polynomial are real, and complex roots always occur in conjugate pairs. **

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A polynomial is an algebraic expression consisting of variables and coefficients, combined using addition, subtraction, and multiplication, but not division or roots. A polynomial function, on the other hand, is a specific type of function that can be defined by a polynomial expression. In other words, a polynomial function is a function that can be expressed as a polynomial. So, while a polynomial is simply an algebraic expression, a polynomial function is a specific type of mathematical function. **

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Polynomial functions are mathematical functions that can be expressed as a sum of terms, where each term is a constant multiplied by a variable raised to a non-negative integer power. These functions can have multiple terms, each with a different power of the variable. Polynomial functions are continuous and smooth, and they can be used to model a wide range of real-world phenomena. They are commonly used in algebra, calculus, and other branches of mathematics to analyze and solve various problems. **

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