Sorghum shoot fly

If α, β are the roots of the equation x² – px + q = 0, then the value of α²+β²+2αβ is 

I. 6 y² + 11 y – 7= 0

II. 21 x² + 5 x – 6 = 0

I. 2x² + 12x + 18 = 0

II. 3y² + 13y + 12 = 0

Equation 1: 2x² - 21x + 54 = 0

Equation 2: 4y² - 23y + 15 = 0

I. y² - 7 y – 18 = 0

II. x² + 10 x + 16 = 0

I. x² - 208 = 233

II. y² + 47 - 371 = 0

I. 104x² + 9x - 35 = 0

II. 72y² - 85y + 25 = 0

In each of these questions, two equations (I) and (II) are given.You have to solve both the equations and give answer   

I. 15b²+ 26b + 8 = 0

II. 20a²+ 7a - 6 = 0

I. x² + 3x – 154 = 0

II. y² + 5y – 126 = 0