Chapter 1 - Equations and Inequalities - 1.4 Quadratic Equations - 1.4 Exercises - Page 123: 98

$a=1, b=0, c=1$

Step 1. Based on the given solutions, let $x_1=i, x_2=-i$ Step 2. The solutions satisfy the equation: $(x-x_1)(x-x_2)=0$ Step 3. Plug-in the solutions, we have $(x-i)(x+i)=0$ which gives $x^2+1=0$ Step 4. We can identify: $a=1, b=0, c=1$