Find the median of the following observations: 16, 12,

I. x² – 12x + 32 = 0

II. y² + y - 20 = 0

I. x² - 33x + 270 = 0

II. y² - 41y + 414 = 0

What is the nature of the roots of the quadratic equation x² – 5x + 7 = 0 ? 

I. (y – 5)² – 9 = 0

II. x² – 3x + 2 = 0

I.  3y² + 13y - 16 = 0

II. 3x² – 13x + 14 = 0

I: x² - 10x + 21 = 0  

II: 4y² - 16y + 15 = 0

I. 6 y² + 11 y – 7= 0

II. 21 x² + 5 x – 6 = 0

I. 2x² + 15 x - 27 = 0

II. 3 y² + 25 y - 18 = 0

I. 8x² - 2x – 15 = 0

II. 12y² - 17y – 40 = 0

I. 15b² + 26b + 8 = 0

II. 20a² + 7a - 6 = 0