3 8 Squares and Square Roots Warm Up

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3 -8 Squares and Square Roots Warm Up Simplify. 1. 52 25 2. 82

3 -8 Squares and Square Roots Warm Up Simplify. 1. 52 25 2. 82 64 3. 122 144 4. 152 225 5. 202 400 Pre-Algebra

3 -8 Squares and Square Roots Learn to find square roots & cube roots.

3 -8 Squares and Square Roots Learn to find square roots & cube roots. Pre-Algebra

3 -8 Squares and Square Roots Square roots • Every number has 2 square

3 -8 Squares and Square Roots Square roots • Every number has 2 square roots: – positive square root – Negative square roots • Principal square root is the positive square roots. • perfect square: a number that has integers as its square roots. – Examples are 1, 4, 9, 16, etc Pre-Algebra

3 -8 Squares and Square Roots Find the two square roots of each number.

3 -8 Squares and Square Roots Find the two square roots of each number. A. 49 49 = 7 49 = – 7 – B. 100 = 10 – 100 = – 10 C. 225 = 15 – 225 = – 15 Pre-Algebra

3 -8 Squares and Square Roots Find the two square roots of each number.

3 -8 Squares and Square Roots Find the two square roots of each number. A. 25 25 = – 5 – B. 144 = 12 – 144 = – 12 C. 289 = 17 – 289 = – 17 Pre-Algebra

3 -8 Squares and Square Roots • Watch brainpop Pre-Algebra

3 -8 Squares and Square Roots • Watch brainpop Pre-Algebra

3 -8 Squares and Square Roots Joke of the day • TEACHER: Donald, what

3 -8 Squares and Square Roots Joke of the day • TEACHER: Donald, what is the chemical formula for water? • DONALD: H I J K L M N O. • TEACHER: What are you talking about? • DONALD: Yesterday you said it's H to O. Pre-Algebra

3 -8 Squares and Square Roots A square window has an area of 169

3 -8 Squares and Square Roots A square window has an area of 169 square inches. How wide is the window? Find the square root of 169 to find the width of the window. Use the positive square root; a negative length has no meaning. 132 = 169 So 169 = 13. The window is 13 inches wide. Pre-Algebra

3 -8 Squares and Square Roots Evaluate the expression. A. 3 36 + 7

3 -8 Squares and Square Roots Evaluate the expression. A. 3 36 + 7 = 3(6) + 7 = 18 + 7 = 25 B. 21 – 5 + 9 = 16 + 9 =4+9 = 13 Pre-Algebra

3 -8 Squares and Square Roots Evaluate the expression. A. 2 25 + 4

3 -8 Squares and Square Roots Evaluate the expression. A. 2 25 + 4 = 2(5) + 4 = 10 B. 41 – 5 + 5 = 36 + 5 =6+5 = 11 Pre-Algebra

3 -8 Squares and Square Roots Cube roots • Cube root – a factor

3 -8 Squares and Square Roots Cube roots • Cube root – a factor that multiplies by itself three times • Examples Pre-Algebra

3 -8 Squares and Square Roots Lesson Quiz Find the two square roots of

3 -8 Squares and Square Roots Lesson Quiz Find the two square roots of each number. 1. 81 ± 9 2. 2500 ± 50 Evaluate each expression. 3. 3 Pre-Algebra 16 + 1 13 4. 7 9 – 2 49 7

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Squares Square Roots Perfect Squares Lesson 12 SquareSquares Square Roots Perfect Squares Lesson 12 Square
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Squares Square Roots Perfect Square Square Number AlsoSquares Square Roots Perfect Square Square Number Also
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Square Roots 3 9 Finding Square Roots WarmSquare Roots 3 9 Finding Square Roots Warm
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