1. $a$
2. $a$
4. $a$

1. $b$
2. $b$
4. $b$

1. $c$
2. $c$
4. $c$

1. $x_1$
2. $x_1$
4. $x_1$

5. $$\color{blue}{\rightarrow}\color{black}\;x_1 \;= \;\frac{-b+\sqrt{b^2-4ac}}{2a}$$

1. $x_2$
2. $x_2$
4. $x_2$

5. $$\color{blue}{\rightarrow}\color{black}\;x_2 \;= \;\frac{-b-\sqrt{b^2-4ac}}{2a}$$

1. $d$
2. $d$
4. $d$

5. $$\color{blue}{\rightarrow}\color{black}\;d \;= \;-\frac{b^2-4ac}{4a}$$

1. $e$
2. $e$
4. $e$

5. $$\color{blue}{\rightarrow}\color{black}\;e \;= \;-\frac{b}{2a}$$

1. $f$
2. $f$
4. $f$

5. $$\color{blue}{\rightarrow}\color{black}\;f \;= \;\frac{1-b^2+4ac}{4a}$$

1. $g$
2. $g$
4. $g$

5. $$\color{blue}{\rightarrow}\color{black}\;g \;= \;-\frac{1+b^2-4ac}{4a}$$

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