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Edit made on August 17, 2011 by ColinWright at 18:37:57

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Quadratic equations and cubic equations are examples of polynomials.

A polynomial in x is of the form:

EQN:p(x)=ax^n+bx^{n-1}+cx^{n-2}+...+px+q

Solving EQN:p(x)=0 will give n /n/ roots, some (or all) of which might be complex (see complex number), although
some may be repeated roots. For example, EQN:x^2-2x+1=0 has two roots,
but both are equal to 1.

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See also Roots of Polynomials