Solve the following equations by using the general expression for a quadratic equation: `x^2 +4ix-4=0`

Solve the following equations by using the general expression for a quadratic equation: ix^(2)-4x-4i=0

Solve the following equations by using the general expression for a quadratic equation: x^(2)-7ix-12=0

Solve the following equations by using the general expression for a quadratic equation: x^(2)-(5-i)x+(18+i)=0

Solve the following equations by using the general expression for a quadratic equation: x^(2)-(7-i)x+(18-i)=0

Solve the following equation by using the general expressions for roots of as quadratic equation: x^(2)-5x+6=0

Solve the following equation by using the general expressions for roots of as quadratic equation: x^(2)-14x+58=0

Solve the equation by using the general expression for roots of a quadratic equation: x^(2)-4x+7=0

Solve the equation by using the general expression for roots of a quadratic equation: 9x^(2)+4=0

Solve the equation by using the general expression for roots of a quadratic equation: -x^(2)+x-2=0

Solve the equation by using the general expression for roots of a quadratic equation: x^(2)+x+2=0