0.4 bzca5e
Transcript of 0.4 bzca5e
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Section P4Polynomials
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How We Describe Polynomials
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n
n
The Degree of ax
If a 0, the degree of ax is n. The degree of a
nonzero constant is 0. The constant 0 has no
defined degree.
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Adding and Subtracting Polynomials
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Combine Like Terms
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Example
Perform the indicated operations and simplify:
3 2 3 26 2 8 13 4 4 14x x x x x
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Example
Perform the indicated operations and simplify:
3 2 3 29 2 9 5 8 10x x x x x x
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Multiplying Polynomials
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Multiplying by a monomial
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Example
2 3 25 2 5 9 14x x x x
Find each product:
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Multiplying Polynomials When Neither is a Monomial
Multipying each term of one polynomial by each term
of the other polynomial. Then combine like terms.
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Example
24 1 10 16x x x
Find each product:
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The Product of Two Binomials: FOIL
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Multiplying Two Binomials
using the Distributive Property
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Example
7 6 3 8x x Find each product:
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Example
9 2 8 9x x
Find each product:
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Multiplying the Sum and Difference of Two Terms
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Example
7 4 7 4x x
Find the product:
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Example
2 28 3 8 3a a
Find the product:
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The Square of a Binomial
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2 2
2 2 2 2
2 2 2 2
First + 2 product + Last =Product
of terms
4 x + 2 x 4 + 4 = x 8 16
2 5 2x + 2 2x -5 + -5 = 4x 20 25
x x
x x
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Example
Find each product:
24x
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Example
Find each product:
22 9x
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Special Products
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Polynomials in Several Variables
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A polynomial in two variables, x and y, contains the sum of one or more monomials in the form axnym. The constant a is the coefficient. The exponents n and m represent whole numbers. The degree of a polynomial in two variables is the highest degree of all its terms.
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Example
Perform the indicated operations:
3 2 3
2 2
2 4 18 19 6 7 14
5 9 7 19 4 71
x y x xy x y xy
x y xy x y xy
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Example
Find the product:
3 7 8 9xy xy
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Example
Find the product:
24 9x y
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(a)
(b)
(c)
(d)
3 2 25 7 9 18 45x y x y xy x y xy
Perform the indicated operations.
3
3 2
3 2
3 2
4 17 52
4 19 52
5 8 17 38
5 8 19 38
x y xy
x y x y xy
x y x y xy
x y x y xy
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(a)
(b)
(c)
(d)
28 9 7 8x x x
Find the product.
3 2
3 2
3 2
3
56 55 9 72
56 55 73 72
56 8 8 72
56 136
x x x
x x x
x x x
x x