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Dividing Polynomials
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one less than the degree of the first term of

the dividend. The final value in the row is the

remainder.

Synthetic Division

Slide 8

Text Example

Text Example

Use synthetic division to divide 5x3 + 6x + 8 by x + 2.

Slide 9

Solution We begin the synthetic division process by bringing down 5. This is following by a series of multiplications and additions.

Solution We begin the synthetic division process by bringing down 5. This is following by a series of multiplications and additions.

Text Example cont.

Slide 10

Text Example cont.

Text Example cont.

Slide 11

The Remainder Theorem

The Remainder Theorem

If the polynomial f (x) is divided by x c, then the remainder is f (c).

Slide 12

The Factor Theorem

The Factor Theorem

Let f (x) be a polynomial.

If f (c ) = 0, then x c is a factor of f (x).

If x c is a factor of f (x), then f ( c) = 0.

Slide 13

Text Example

Text Example

Solve the equation 2x3 3x2 11x + 6 = 0 given that 3 is a zero of f (x) = 2x3 3x2 11x + 6.

Slide 14

Solution

Solution

Now we can solve the polynomial equation.

The solution set is {-2, 1/2 , 3}.

Text Example cont.

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