Determine the nature of roots of the following quadratic equation.

m² + 2m + 9 = 0

Determine the nature of roots of the following quadratic equation.

x² – 4x + 4 = 0

Determine the nature of roots of the following quadratic equation.

2y² – 7y + 2 = 0

Form the quadratic equation from the roots given below.

(1) 0 and 4

(2) 3 and -10

(3)

(4)

Sum of the roots of a quadratic equation is double their product. Find k if equation is

x² – 4kx + k + 3 = 0