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**Algebra Tiles – Completing the Square**

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**Use algebra tiles to complete the square for the equation: x2 + 6x + 2 = 0**

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**Step 1: Subtract 2 from each side to model x2 + 6x = -2**

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**Step 2: Begin to arrange the x2 and x tiles into a square**

1 1 x = x x

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**Step 3: Add enough “1”s to complete the square**

Then, add the same number to the other side x2 x x x 1 1 x 1 1 1 1 1 1 = x 1 1 1 1 1 1 x 1 1 1 1 1 1

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**Step 4: remove zero pairs**

x2 x x x 1 1 x 1 1 1 1 1 1 = x 1 1 1 1 1 1 x 1 1 1 1 1 1

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**= New equation: x2 + 6x +9 = 7 x2 x x x x 1 1 1 1 x 1 1 1 1 1 1 x 1 1**

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Objective Video Example by Mrs. G Give It a Try Lesson 5.5 Complete the square to make an expression a perfect square trinomial Solve quadratic equations.

Objective Video Example by Mrs. G Give It a Try Lesson 5.5 Complete the square to make an expression a perfect square trinomial Solve quadratic equations.

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