Polynomial functions and their roots

There are 23 NRICH Mathematical resources connected to Polynomial functions and their roots
Curve fitter
problem
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Curve fitter

Age
14 to 18
Challenge level
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This problem challenges you to find cubic equations which satisfy different conditions.

Common Divisor
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Common divisor

Age
14 to 16
Challenge level
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Find the largest integer which divides every member of the following sequence: 1^5-1, 2^5-2, 3^5-3, ... n^5-n.
Mechanical Integration
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Mechanical integration

Age
16 to 18
Challenge level
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To find the integral of a polynomial, evaluate it at some special points and add multiples of these values.
Exploring cubic functions
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Exploring cubic functions

Age
14 to 18
Challenge level
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Quadratic graphs are very familiar, but what patterns can you explore with cubics?

Spinners
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Spinners

Age
16 to 18
Challenge level
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How do scores on dice and factors of polynomials relate to each other?
Polynomial Relations
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Polynomial relations

Age
16 to 18
Challenge level
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Given any two polynomials in a single variable it is always possible to eliminate the variable and obtain a formula showing the relationship between the two polynomials. Try this one.
Root to Poly
problem
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Root to poly

Age
14 to 16
Challenge level
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Find the polynomial p(x) with integer coefficients such that one solution of the equation p(x)=0 is $1+\sqrt 2+\sqrt 3$.
Interpolating polynomials
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Interpolating polynomials

Age
16 to 18
Challenge level
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Given a set of points (x,y) with distinct x values, find a polynomial that goes through all of them, then prove some results about the existence and uniqueness of these polynomials.
Patterns of inflection
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Patterns of inflection

Age
16 to 18
Challenge level
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Find the relationship between the locations of points of inflection, maxima and minima of functions.