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Questions from HW???

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2.13 Use Square Roots to Solve Quadratic Equations 2.10-2.13 Test: FRIDAY!!!!

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Vocabulary If b 2 = a then b is a square root of a. All positive real numbers have two square roots A positive square root (or principle square root) and a negative square root. This is written as

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Vocabulary A square root is written with the radical symbol The number or expression inside the radical symbol is the radicand.

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Vocabulary The square of an integer is called a perfect square.

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Example 1: Solve the equation: x 2 – 7 = 9 z 2 + 13 = 5

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Example 2: Solve 9m 2 = 169

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Example 3: Solve 2x 2 + 5 = 15

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Example 4: Solve 3(x + 3) 2 = 39

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You Try: w 2 – 9 = 0 4r 2 – 7 = 9 2(y + 4) 2 = 18

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Classwork: P. 121 #2-24 EVENS

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Do Now: Solve the following equations: x 2 = 25 x 2 = 50 Explain your thinking.

Do Now: Solve the following equations: x 2 = 25 x 2 = 50 Explain your thinking.

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