![]() We've already mentioned what appears in the partial fraction formula, but we've yet to see it in detail. Feel free to check out Omni's algebra calculators section to find some useful tools to help with that, such as synthetic division or the rational zeros theorem. In general, factoring polynomials of a high order is an extremely difficult problem. Either way, these factors are what appears in the denominators of the partial fraction formula. If we were to move to complex numbers, we would obtain only binomials in the expansion. In fact, the quadratic factors appear (i.e., cannot be decomposed into two of order 1) only when they have no real roots. In other words, however large the exponents of your polynomial, you can write the whole thing as a product of binomials and quadratic polynomials. When we work with real numbers (anything from 1, through fractions, roots, up to numbers such as π and the Euler number e), every polynomial can be decomposed into factors of degree 1 or 2. ![]() The very basic one concerns factoring polynomials. However, before we see how to do partial fraction decomposition, we need to go through several math properties. A sum of several rational expressions, true. Luckily, there are ways to write such things in a nicer way. Just look at an example of such a monstrosity: 3x² - 2x + 5 Needless to say, such objects are a bit more difficult to operate than simple polynomials. In mathematics, a quotient of two polynomials is often called a rational function or a rational expression. Nevertheless, today we'll focus only on those with a single one, just like the partial fraction decomposition calculator. Note how there may be more than one letter in a polynomial. However, the variables cannot appear under a root, inside functions (e.g., trigonometric functions or logarithms), with fractional powers, etc. In other words, they describe functions that consist of numbers, letters (i.e., variables), and basic arithmetic expressions. Polynomials are algebraic expressions that contain variables only in non-negative integer powers.
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