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How many values of x and y satisfy the equation 2x + 4y = 8 & 3x + 6y = 10.

I. x² - 9x - 52 = 0

II. y² - 16y + 63 = 0

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

I. x² + 12√2 x + 22 = 0

II. y² - 13√2 y – 28 = 0

I. 66x² - 49x + 9 = 0

II. 46y² - 37y - 30 = 0

I. 27x² + 120x + 77 = 0

II. 56y² + 117y + 36 = 0

I. 2x² + 3x - 9 = 0

II. 3y² - y - 10 = 0

I. 2y²- 37y + 143 = 0

II. 2x²+ 15x – 143 = 0

I. 5x² – 7x – 6 =0

II. 2y² – 5y – 7 =0

I. 2x² - 9x + 10 = 0

II. 3y² + 11y + 6 = 0