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Do Now : Evaluate when x = 6, y = -2 and z = 3

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6-5 The Quadratic Formula and the Discriminant Objectives Students will be able to: 1)Solve quadratic equations by using the Quadratic Formula 2)Use the discriminant to determine the number and type of roots of a quadratic equation

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Using the quadratic formula is yet another way to solve quadratic equations. Find the solutions of a quadratic equation in the form

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Solve each equation by using the quadratic formula. 1)

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2)

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Try these. 5)6)

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The discriminant The discriminant is the expression within the quadratic formula that is can be used to determine the number and type of roots of a quadratic equation.

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Find the value of the discriminant for each quadratic equation. Then describe the number and type of roots for the equation. 1)2)

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3)4)

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Try these. 5)6)

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Homework Text p. 318 #s 16-23 all

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