x^2+ir+1=0

Solution for x^2+ir+1=0 equation:

Simplifying
x2 + ir + 1 = 0

Reorder the terms:
1 + ir + x2 = 0

Solving
1 + ir + x2 = 0

Solving for variable 'i'.

Move all terms containing i to the left, all other terms to the right.

Add '-1' to each side of the equation.
1 + ir + -1 + x2 = 0 + -1

Reorder the terms:
1 + -1 + ir + x2 = 0 + -1

Combine like terms: 1 + -1 = 0
0 + ir + x2 = 0 + -1
ir + x2 = 0 + -1

Combine like terms: 0 + -1 = -1
ir + x2 = -1

Add '-1x2' to each side of the equation.
ir + x2 + -1x2 = -1 + -1x2

Combine like terms: x2 + -1x2 = 0
ir + 0 = -1 + -1x2
ir = -1 + -1x2

Divide each side by 'r'.
i = -1r-1 + -1r-1x2

Simplifying
i = -1r-1 + -1r-1x2