Solving Quadratic Equations 9 7 by Using Square
![Solving Quadratic Equations 9 -7 by Using Square Roots Objective Solve quadratic equations by Solving Quadratic Equations 9 -7 by Using Square Roots Objective Solve quadratic equations by](https://slidetodoc.com/presentation_image_h/21e37ee91c9d4fd8f0d02d11d6d7d74b/image-1.jpg)
Solving Quadratic Equations 9 -7 by Using Square Roots Objective Solve quadratic equations by using square roots. Holt Mc. Dougal Algebra 1
![Solving Quadratic Equations 9 -7 by Using Square Roots Positive Square root of 9 Solving Quadratic Equations 9 -7 by Using Square Roots Positive Square root of 9](http://slidetodoc.com/presentation_image_h/21e37ee91c9d4fd8f0d02d11d6d7d74b/image-2.jpg)
Solving Quadratic Equations 9 -7 by Using Square Roots Positive Square root of 9 Negative Square root of 9 When you take the square root of a positive number and the sign of the square root is not indicated, you must find both the positive and negative square root. This is indicated by ±√ Positive and negative Square roots of 9 Holt Mc. Dougal Algebra 1
![Solving Quadratic Equations 9 -7 by Using Square Roots Reading Math The expression ± Solving Quadratic Equations 9 -7 by Using Square Roots Reading Math The expression ±](http://slidetodoc.com/presentation_image_h/21e37ee91c9d4fd8f0d02d11d6d7d74b/image-3.jpg)
Solving Quadratic Equations 9 -7 by Using Square Roots Reading Math The expression ± 3 is read “plus or minus three” Holt Mc. Dougal Algebra 1
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Solving Quadratic Equations 9 -7 by Using Square Roots Holt Mc. Dougal Algebra 1
![Solving Quadratic Equations 9 -7 by Using Square Roots Example 1 Solve using square Solving Quadratic Equations 9 -7 by Using Square Roots Example 1 Solve using square](http://slidetodoc.com/presentation_image_h/21e37ee91c9d4fd8f0d02d11d6d7d74b/image-5.jpg)
Solving Quadratic Equations 9 -7 by Using Square Roots Example 1 Solve using square roots. Check your answer. x 2 = 169 x 2 = – 49 x 2 = 121 x 2 = – 16 Holt Mc. Dougal Algebra 1
![Solving Quadratic Equations 9 -7 by Using Square Roots If necessary, use inverse operations Solving Quadratic Equations 9 -7 by Using Square Roots If necessary, use inverse operations](http://slidetodoc.com/presentation_image_h/21e37ee91c9d4fd8f0d02d11d6d7d74b/image-6.jpg)
Solving Quadratic Equations 9 -7 by Using Square Roots If necessary, use inverse operations to isolate the squared part of a quadratic equation before taking the square root of both sides. Holt Mc. Dougal Algebra 1
![Solving Quadratic Equations 9 -7 by Using Square Roots Example 2 Solve using square Solving Quadratic Equations 9 -7 by Using Square Roots Example 2 Solve using square](http://slidetodoc.com/presentation_image_h/21e37ee91c9d4fd8f0d02d11d6d7d74b/image-7.jpg)
Solving Quadratic Equations 9 -7 by Using Square Roots Example 2 Solve using square roots. x 2 + 7 = 7 16 x 2 – 49 = 0 Holt Mc. Dougal Algebra 1
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Solving Quadratic Equations 9 -7 by Using Square Roots Example 3 Solve by using square roots. Check your answer. 100 x 2 + 49 = 0 (x – 5)2 = 16 Holt Mc. Dougal Algebra 1
![Solving Quadratic Equations 9 -7 by Using Square Roots When solving quadratic equations by Solving Quadratic Equations 9 -7 by Using Square Roots When solving quadratic equations by](http://slidetodoc.com/presentation_image_h/21e37ee91c9d4fd8f0d02d11d6d7d74b/image-9.jpg)
Solving Quadratic Equations 9 -7 by Using Square Roots When solving quadratic equations by using square roots, you may need to find the square root of a number that is not a perfect square. In this case, the answer is an irrational number. You can approximate the solutions. Holt Mc. Dougal Algebra 1
![Solving Quadratic Equations 9 -7 by Using Square Roots Example 4 Solve. Round to Solving Quadratic Equations 9 -7 by Using Square Roots Example 4 Solve. Round to](http://slidetodoc.com/presentation_image_h/21e37ee91c9d4fd8f0d02d11d6d7d74b/image-10.jpg)
Solving Quadratic Equations 9 -7 by Using Square Roots Example 4 Solve. Round to the nearest hundredth. x 2 = 15 – 3 x 2 + 90 = 0 0 = 90 – x 2 + 45 = 0 Holt Mc. Dougal Algebra 1
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Solving Quadratic Equations 9 -7 by Using Square Roots Holt Mc. Dougal Algebra 1
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