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Warm Up Simplify.

Warm Up Simplify. 1. 5 2 2. 8 2. 64. 25. 225. 144. 3. 12 2 4. 15 2. 400. 5. 20 2. Lesson 3-5. Squares and Square Roots. You'll Learn how to. Find Square Roots. Perfect Squares. 1. 4. 9. 16. 1 2 =. 2 2 =. 3 2 =. 4 2 =. 5 2 =. 25. 36. 49. 64. 6 2 =. 7 2 =.

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Warm Up Simplify.

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  1. Warm Up Simplify. 1. 522. 82 64 25 225 144 3. 1224. 152 400 5. 202

  2. Lesson3-5 Squares and Square Roots You'll Learn how to Find Square Roots

  3. Perfect Squares 1 4 9 16 12 = 22 = 32 = 42 = 52 = 25 36 49 64 62 = 72 = 82 = 92 = 81 100 121 144 102 = 112 = 122 = 132 = 169 196 225 256 142 = 152 = 162 = 172 = 289 324 361 400 182 = 192 = 202 =

  4. + + – – 1 EXAMPLE Find Square roots Square root ... a value that can be multiplied by itself to give the original number. 5●5 25 Perfect Square Square Root -5●-5 Find the two square roots of every number ● 10 10 = 100 WHY? 100 10 1) ● (-10) (-10) = 100 16 4 2)

  5. 25 16 2 EXAMPLE Principal Square root (Radical) , is used to indicate the positive square root only. Simplify each expression 1) 121 11 = 2) 5 + 11 16 4 = = 5 3) = 4 3 36 + 7 3 ● 6 + 7 18 + 7 25 4) = = = 36 49 6 ● 7 42 5) = =

  6. Lesson Quiz Find the two square roots of each number. 1. 81 2. 2500 Evaluate each expression. 3. 3 16 + 1 4. 7 9 – 2 49 9 50 7 13 5. Ms. Estefan wants to put a fence around 3 sides of a square garden that has an area of 225 ft2. How much fencing does she need? 45 ft

  7. Lesson Quiz for Student Response Systems 1. Find two square roots of each number. 64 A. 4 B. 8 C.9 D.16

  8. Lesson Quiz for Student Response Systems 2. Find two square roots of each number. 6400 A. 4 B. 8 C.80 D.800

  9. Lesson Quiz for Student Response Systems 3. Evaluate the expression. A. 17 B. 17 C.19 D.72

  10. Lesson Quiz for Student Response Systems 4. Evaluate the expression. A. 4 B. 8 C.16 D.40

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