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**7-5 solving quadratic equations**

Objective: Solve quadratic equations and find if a quadratic equation has two solutions, one solution, or no solutions. Algebra 1 CP

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Work with a partner Find the x-intercepts of y = - x2 – 2x + 3. What are the solutions of - x2 – 2x + 3 = 0?

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**Standard form of a quadratic equation**

A quadratic equation is an equation that can be written in standard form: ax2 + bx + c = 0, where a ≠0 Ex: Write 6x2 = 5x – 12 in standard form.

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Example 1 Solve 2x2 – 98 = 0

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Example 2 Solve -2x = 0

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Using a calculator Solve each equation by graphing the related function. a. x2 – 4 = 0 b. x2 = 0 c. x2 + 4 = 0

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Homework Pg 340 # 2 – 18 even ,

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