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1-4 The Distributive Property
Goal: Use the distributive property to evaluate and simplify expressions.
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Vocabulary = 2(x + 5) = 2(x) + 2(5) 2x + 10 (x + 5)2 = (x)2 + (5)2 =
Distributive Property - Multiplying a term outside parenthesis by all terms inside parenthesis. = 2(x + 5) = 2(x) + 2(5) 2x + 10 (x + 5)2 = (x)2 + (5)2 = 2x + 10
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BE CAREFUL WITH NEGATIVES!!!
THE DISTRIBUTIVE PROPERTY (–3)(1 + x) = –3 – 3x (y – 5)(–2) = –2y + 10 –(7 – 3x) = –7 + 3x Forgetting to distribute the negative sign when multiplying by a negative factor is a common error.
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Examples 3(x + 7) -5(y + 6) 4x(3x – 8) (6x – 5)(-12) 4(y2 + 8y + 2)
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Simplify 6(x – 4). A. 6x – 4 B. 6x – 24 C. x – 24 D. 6x + 2
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Simplify 3(x3 + 2x2 – 5x + 7). A. 3x3 + 2x2 – 5x + 7 B. 4x3 + 5x2 – 2x + 10 C. 3x3 + 6x2 – 15x + 21 D. x3 + 2x2 – 5x + 21
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Distributive Property and Combining like terms
5x + 3(2x – 7) 5x + 6x – 21 11x – 21 Distribute Combine Like Terms
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Distributive Property and Combining like terms
3 – 2(4 + x) 3 – 8 – 2x –5 – 2x
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examples 4(2x – 3) + 7x 2 + 6(-4x + 8) 5x – 4(3x – 9) 6x(3x – 8) + 12x
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Simplify the expression 3(2x – y) + 2(4x + y).
A. 2x + 4y B. 11x C. 14x – y D. 12x + y
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Practice Worksheet – “Simplifying Algebraic Expressions”
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homework Pages #25-28, 33-39, 46, 47
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