Finite Math Examples

$- 2 = a {(1)}^{2} + b (1) + c$ , $- 2 = a {(1)}^{2} + b (1) + c$ , $- 4 = a {(3)}^{2} + b (3) + c$

Step 1

$- 2 = a {(1)}^{2} + b (1) + c, - 2 = a {(1)}^{2} + b (1) + c, - 4 = a {(3)}^{2} + b (3) + c$