Rio m40 Chapter 5

Rio m40 Chapter 5 - Chapter 5 Multiplying with variables...

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1 Chapter 5 Multiplying with variables Multiply the numbers and write the letters   x 2 3   y x 3 2   3 4 s   y x 2 3    rs r 3 2 5   y x 2 3   3 4 s   3 4 s   y x 2 3 DISTRIBUTING   2 3 x   1 2 5 x   2 x   2 3 5 x    2 6 5 r Expressions Expressions do not have an equal sign. Expressions are like your hair sometimes there too long and you need to cut them down to size. You just simplify them. Add or Subtract (Must have like terms) + 1 + 3 4 The number in front tells you how many you have. So, one apple plus three apples is four apples. Remember this ---the + means you can only count or remove your like terms, that is all. YOU CAN NOT CANCEL, OR USE EXPONENT RULES. A) 5 + 3 B) 4 X + 7 X C) 3 + 2 + 2 D) 8x - 5x² + 6x²    ys r 3 2 5
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2 E) y x x 2 3 G) 5 1 x + 5 2 x F) a A a A a 2 8 12 The sign belongs to the letter, so for the little a’s we have 12 a +a –2a for the capital A’s we have –A -8A This gives us a simplified answer of _________________________________ 1) –m –n -8m +n 2) AB AB 3 9 3) 3X-8Y-10X+4 4) Y Y 9 4 3 2 5) 2 2 12 5 8 3 x x 6) x y x 9 2 . 3 25 . 0 Expression #1     1 5 4 2 3 x x It’s to long, cut it down to size. 1) Distribute 2) Combine like terms Try:     x x 3 2 2 4 3   8 3 t t   8 4 t
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3 Polynomials ------- x x x x x x x 3 1 3 1 2 3 2 1 3 4 2 3 Degree of a Polynomial x x x x x x x 3 1 3 1 2 3 2 1 3 4 2 3 Identify the following polynomials: x x x x x x x x 3 1 2 3 2 3 2 1 2 3 4 4 2 3
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This note was uploaded on 01/13/2012 for the course MATH 30 taught by Professor Ianmccance during the Spring '12 term at Harvard.

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Rio m40 Chapter 5 - Chapter 5 Multiplying with variables...

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