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Sections 11.1: Square Roots & 11.2: Approximating Square Roots

Sections 11.1: Square Roots & 11.2: Approximating Square Roots. Pg.533, 540. Objectives & Vocabulary. Evaluate expressions using square roots (11.1). Approximate square roots of numbers (11.2).

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Sections 11.1: Square Roots & 11.2: Approximating Square Roots

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  1. Sections 11.1: Square Roots & 11.2: Approximating Square Roots Pg.533, 540

  2. Objectives & Vocabulary • Evaluate expressions using square roots (11.1). • Approximate square roots of numbers (11.2). • Square root (pg.533): of a number n, the square root is the number m which, when multiplied by itself, equals n. • Perfect square (pg.533): numbers that are squares of integers [ex: 4 and 25 are perfect squares]. • Radical expression (pg.534): an expression involving a radical sign (or square root). • Irrational number (pg.541): cannot be written as a quotient of two integers, and the decimal form of an irrational number neither terminates nor repeats [ex: the square root of 11]. • Real number (pg.541): all rational and irrational numbers (any number is a real number).

  3. Example 1: Finding Square Roots • Find the square root of 81. • Find the square root of 49.

  4. Example 2: Evaluating Square Roots

  5. Example 3: Evaluating Radical Expressions

  6. Example 4: Solving Equations Using Square Roots

  7. Example 5: Approximating Square Roots

  8. Homework Time—yea! • Pg.535(2-22E) & • pg.542-543(2-20E, no10)

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