simplification copyrighted © by t. darrel westbrook
TRANSCRIPT
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Simplification
Copyrighted © by T. Darrel Westbrook
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26 August 2010 Alg2_Simplification.pptCopyrighted © T. Darrel Westbrook
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Simplification
What to Simplify?
In this lesson you will learn
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Simplification
All FractionsAre Reduced
What toSimplify?
DenominatorCan’t Have
ComplexNumbers
RadicalNumbers
RationalNumbers
NegativeNumbers
CombineLike Terms
No NegativeExponents
Index of AllRadicals as Small
As Possible
All ParenthesisRemoved
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Simplification
Why is x2 and x two different terms?How about x and y?What is a term?SimplifyAre 5 and –13 like terms?
CombineLike Terms
3x2 + 2x – 5 – x2 + 7 = y 4x2 + 2x + 2 = y3x2 + 2x – 5 + 7 = f(x) – 2x2 + 3x 5x2 – x – 5 = f(x)g(x) = 4x – 3x = 3x – 5 + 7 g(x) = 3x – x + 7
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Simplification
All ParenthesisRemoved
(2x – 3) = f(x) 2x – 3 = f(x)f(x) = – 5(2x – 3) f(x) = – 10x + 15h(x) = – (4x – 7) h(x) = – 4x + 7g(x) = x2 + 3x – (4x2 – 7) g(x) = – 4x2 + 3x + 7
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Simplification
No NegativeExponents
2–4x –3 + x = k(x)1
24
1
16=x31
x3 + x = 1
x3 + = x4
x3
1 + x4
x3
1
x –3
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Simplification
22 3 23=24/8 = 2 ½ = 2a4/6 = a2/3 = a23
Index of AllRadicals as Small
As Possible
12248a46
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Simplification
All FractionsAre Reduced
3
6
1
2
7x
6
x
4+ = g(x)14x
12
3x
12+ = = g(x)17x
12k(x) = –1/2 x +6/4 x – 4 k(x) = x – 4
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Simplification
DenominatorCan’t Have
ComplexNumbers
RadicalNumbers
RationalNumbers
NegativeNumbers
No Fractions
In Denominator
x5/6
Numbers of the Form
a + bi
3– 2 + 5i
3
2x – 9
No Negative
Numbers In
Denominator
3–2
Numbers
of the Form1a
How to eliminate complex and radicals from the denominator will be discussed in a later lesson.
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Simplification
Expressions, equalities, or inequalities all follow the same simplification process. Simplification and Order of Operations adds deterministic structure to mathematics (means there is no
ambiguity).
This means that if you and another student of mathematics work the same problems containing grouping symbols and operators,
you both will get the same answer (assuming, of course, you made no simplification, arithmetic, or Order of Operations
errors).
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