The Polynomial Project

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Presentation transcript:

The Polynomial Project

Introduction: The concept of degree of a polynomial is important, because it give us information about the behavior of the polynomial on the whole. The concept of polynomial functions goes way back to Babylonian times, as a simple need of computing the area of a square is a polynomial, and is needed in buildings and surveys, fundamental to core civilization. Polynomials are used for fields relating to architecture, agriculture, engineering fields such as electrical and civil engineering, physics, and various other science related subjects.

Approximation by Means of Polynomials Many scientific experiments produce pairs of numbers [x, p(x)] that can be related by a formula. If the pairs form a function, you can fit a polynomial to the pairs in exactly one way. For 2 pairs of numbers you can write a polynomial of degree 1. px=A+Bx-x0 For 3 pairs of numbers you can write a polynomial of degree 2. px=A+Bx-x0+Cx-x0x-x1 For 4 pairs of numbers you can write a polynomial of degree 3. px=A+Bx-x0+Cx-x0x-x1+Dx-x0x-x1(x-x2) And so on.

The Bisection Method for Approximating Real Zeros The bisection method can be used to approximate zeros of polynomial functions like fx=x3+x2-3x-3 (To the nearest tenth) Since f (1) = -4 and f (2) = 3, there is at least one real zero between 1 and 2. The midpoint of this interval is 1.5 Since f(1.5) = -1.875, the zero is between 1.5 and 2. The midpoint of this interval is 1.75. Since f(1.75) is about 0.172, the zero is between 1.5 and 1.75.

The Bisection Method for Approximating Real Zeros The midpoint of this interval is 1.625 Since f(1.625) is about -0.94. The zero is between 1.625 and 1.75. The midpoint of this interval is 1.6875. Since f(1.6875) is about -0.41, the zero is between 1.6875 and 1.75. Therefore, the zero is 1.7 to the nearest tenth. The diagram below summarizes the results obtained by the bisection method.

Real World Construction You are planning a rectangular garden. Its length is twice its width. You want a walkway w feet wide around the garden. Let x be the width of the garden.

DONE BY: MOHAMMED SALEM SAEED AL MANSOURI RASHED SAIF RASHED AL KETBI 11.03