The Quadratic Formula



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The Quadratic Formula

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Mathematics Volume 1 of 2

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The Quadratic Formula

Algebra QUADRATIC EQUATIONS Step 3. Check the roots. 4x² 2 x² 7x 4^� � � � � � 1 3 2 2 � � � � � � 1 3 2 7^� � � � � � 1 3 4^� � � � � � 1 9 2 1 9 � � � � � � 7 3 4 9 18 9 1 9 21 9 22 9 22 9 and, 4x² + 2 = x² - 7x 4(-2)² + 2 = (-2)² - 7(-2) 4(4) + 2 = 4 -(-14) 16 + 2 = 4 + 14 18 = 18 Thus, the roots check. Rev. 0 Page 27 MA-02

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