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Critical Thinking / Discussion / Writing

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79. $- 1$ $- 1$
81. 1
83. $A = \frac{5}{4} B = \frac{3}{4}$ $A = \frac{5}{4} B = \frac{3}{4}$
85. $(x + 2) (x + 3)$ $(x + 2) (x + 3)$
87. $(2 x - 1) (x + 3)$ $(2 x - 1) (x + 3)$
89. $(2 x - 3) (2 x + 3)$ $(2 x - 3) (2 x + 3)$

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