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Published byFrancis White Modified over 7 years ago

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Review of Radicals and Quadratic Equations Lesson 9.1

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Simplify Radical Expressions: = = = 4

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(3 )2)2 = 33 = 63 Try: = = 3 or 1. 2.

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Quadratic Equations Method 1: Solve for x (remember you will have ± in your answer) x 2 + 9 = 25 x 2 = 16 x = ± 4

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Method 2: Factoring x 2 + 9 = 25 x 2 - 16 = 0 (x-4)(x+4) = 0 (factor) x-4 = 0 or x+4=0 x = ± 4 Notice that with either method you get the same answer.

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Try this one: x 2 = (5 ) 2 + ( ) 2 25 3 + 5 75 + 5 80 x 2 = x =

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Simplify: + -

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(10, 0) (0, 7) (0, 0) A B C Find AB 7 2 + 10 2 = AB 2 49 + 100 = AB 2 149 = AB 2

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