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Unformatted text preview: created by Mr. Lafferty created by Mr. Lafferty Finding roots graphically Finding roots by factorising Finding roots using formula Solving Quadratic Solving Quadratic www.mathsrevision.com Int 2 created by Mr. Lafferty created by Mr. Lafferty Starter Starter 2 2 x +7 x +6 Q 3 . S olve (2 x  1)(x  1) = 0 1. Factorise the following. 2. A TV is reduced by 20% to 200. What was the original price. www.mathsrevision.com Int 2 created by Mr. Lafferty created by Mr. Lafferty Learning Intention Learning Intention Success Criteria Success Criteria 1. 1. Use graphs to locate roots of a Use graphs to locate roots of a quadratic equation. quadratic equation. 1. To sow how to solve quadratic equations graphically. 2. 2. Solve quadratic equations by Solve quadratic equations by finding the roots. finding the roots. www.mathsrevision.com Int 2 Graphical Roots Graphical Roots created by Mr. Lafferty created by Mr. Lafferty www.mathsrevision.com Int 2 Graphical Roots Graphical Roots Finding the roots (solve) of a quadratic equation is simply finding where the graph crosses the x axis ie. f(x) = 0 Example : Find the roots (solve) of the quadratic equations below....
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 Spring '10

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