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

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

Solve the equation by using the general expression for roots of a quadratic equation: x^2-x+1=0

Solve the equation by using the general expression for roots of a quadratic equation: x^2+x+1=0

Solve the equation by using the general expression for roots of a quadratic equation: x^2+3=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: 5x^2-6x+2=0

Solve the equation by using the general expression for roots of a quadratic equation: x^2-8x+1=0

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