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Previous Chapter

Applying the Concepts

Getting Ready for the Next Section

Beyond the Basics

101. $f (x) = 3 x^{2} + 12 x + 15$ $f (x) = 3 x^{2} + 12 x + 15$
103. $f (x) = 6 x^{2} - 12 x + 4$ $f (x) = 6 x^{2} - 12 x + 4$
105. $f (x) = - 2 x^{2} + 12 x + 14$ $f (x) = - 2 x^{2} + 12 x + 14$
107. Opening up: $x^{2} - 4 x - 12;$ $x^{2} - 4 x - 12;$ opening down: $- x^{2} + 4 x + 12$ $- x^{2} + 4 x + 12$
109. Opening up: $x^{2} + 8 x + 7;$ $x^{2} + 8 x + 7;$ opening down: $- x^{2} - 8 x - 7$ $- x^{2} - 8 x - 7$

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