How to write a polynomial in standard form with given roots

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How to write a polynomial in standard form with given roots

Methods for solving cubic equations appear in The Nine Chapters on the Mathematical Arta Chinese mathematical text compiled around the 2nd century BC and commented on by Liu Hui in the 3rd century. Some others like T. Heathwho translated all Archimedes ' works, disagree, putting forward evidence that Archimedes really solved cubic equations using intersections of two conicsbut also discussed the conditions where the roots are 0, 1 or 2.

In an early paper, he discovered that a cubic equation can have more than one solution and stated that it cannot be solved using compass and straightedge constructions. He also found a geometric solution.

However, he gave one example of a cubic equation: He used what would later be known as the " Ruffini - Horner method" to numerically approximate the root of a cubic equation. He also used the concepts of maxima and minima of curves in order to solve cubic equations which may not have positive solutions.

In fact, all cubic equations can be reduced to this form if we allow m and n to be negative, but negative numbers were not known to him at that time.

Del Ferro kept his achievement secret until just before his death, when he told his student Antonio Fiore about it. He was soon challenged by Fiore, which led to a famous contest between the two.

Each contestant had to put up a certain amount of money and to propose a number of problems for his rival to solve. Whoever solved more problems within 30 days would get all the money.

Later, Tartaglia was persuaded by Gerolamo Cardano — to reveal his secret for solving cubic equations. InTartaglia did so only on the condition that Cardano would never reveal it and that if he did write a book about cubics, he would give Tartaglia time to publish.

Some years later, Cardano learned about Ferro's prior work and published Ferro's method in his book Ars Magna inmeaning Cardano gave Tartaglia six years to publish his results with credit given to Tartaglia for an independent solution.

Cardano's promise with Tartaglia stated that he not publish Tartaglia's work, and Cardano felt he was publishing del Ferro's, so as to get around the promise.

how to write a polynomial in standard form with given roots

Nevertheless, this led to a challenge to Cardano by Tartaglia, which Cardano denied. The challenge was eventually accepted by Cardano's student Lodovico Ferrari — Ferrari did better than Tartaglia in the competition, and Tartaglia lost both his prestige and income.

He even included a calculation with these complex numbers in Ars Magna, but he did not really understand it. Rafael Bombelli studied this issue in detail [21] and is therefore often considered as the discoverer of complex numbers.

Stationary point The critical points of a function are those values of x where the slope of the function is zero.Welcome to my math notes site. Contained in this site are the notes (free and downloadable) that I use to teach Algebra, Calculus (I, II and III) as well as Differential Equations at Lamar University.

C# Helper contains tips, tricks, and example programs for C# programmers. To find the general form of the polynomial, I multiply the factors: (x – 3)(x + 5)(x + ½) = (x 2 + 2 x – 15)(x + ½) = x 3 + x 2 – 14 x – This polynomial has decimal coefficients, but I'm supposed to be finding a polynomial with integer coefficients. Part I: Write the factors (in the form x - a) that are associated with the roots (a) given in the problem. (2 points) Part II: Multiply the 2 factors with complex terms to produce a quadratic expression.

The notes contain the usual topics that are taught in those courses as well as a few extra topics that I decided to include just because I wanted to. p(x)=x^x For a polynomial, if x=a is a zero of the function, then (x-a) is a factor of the function.

We have two unique zeros: 2 and 4. However, -2 has a multiplicity of 2, which means that the factor that correlates to a zero of -2 is represented in the polynomial twice. Polynomial equations in factored form All equations are composed of polynomials.

Earlier we've only shown you how to solve equations containing polynomials of the first degree, but it is of course possible to solve equations of a higher degree. Combine like terms and write with powers of x in descending order, which is the standard form of a polynomial function.

Related questions

This lesson considered . Guess and Check “Guess and Check” is just what it sounds; we have certain rules, but we try combinations to see what will work.

NOTE: Always take a quick look to see if the trinomial is a perfect square trinomial, but you try the guess and these cases, the middle term will be twice the product of the respective square roots of the first and last terms, as we saw above.

Writing Polynomials in Standard Form When giving a final answer, you must write the polynomial in standard form. Standard form means that you write the .

Writing Polynomials in Standard Form