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Published byHayley Armes Modified over 2 years ago

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Expanding and Simplifying Algebraic Expressions x + x = 2x 2x - 5x = -3x 2(x + 1) + 3(x + 3) = 2x x + 9 = 5x + 11

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6 + (x - 1)(4) Four groups of (x - 1)

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6 + (x - 1)(4) This is a zero model.

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6 + (x - 1)(4) = 2 + 4x The simplified expression is 2 + 4x or 4x + 2. How can you use algebra tiles to show that 2 + 4x is the same as 4x + 2 ?

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1.2x x x - 2x (x - 1) 4.-2 (x + 2) Simplify:

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1. 2x x - 5 Simplify:

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1. 2x x - 5 Simplify: zero = 6x - 2

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2. x - 2x Simplify:

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2. x - 2x Simplify: zero = -x - 6

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3. 3 (x - 1) Simplify: = 3x - 3 How could you get this answer without using algebra tiles?

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4. -2 (x - 2) Simplify: Step 1 2 (x - 2) Step 2 The opposite

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4. -2 (x - 2) Simplify: 2 (x - 2) -2 (x - 2) = -2x + 4 How could you get this answer without using algebra tiles?

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-2 (x - 2) + 3 (2x + 1) = -2x x + 3 = 4x + 7 Steps without algebra tiles How could you check your answer to see if it is equivalent to the original expression?

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