Which pair of cities does the Yamuna Expressway connect?

I. 6x² – 7x - 20 = 0

II. 3y² - y - 14 = 0

Equation 1: x² - 180x + 8100 = 0

Equation 2: y² - 170y + 7225 = 0

I. 4x² + 3√7 x-7 =0

II. 7y² + 4√7 y-5=0

I. 2x² - 15x  + 13 = 0

II. 3y² - 6y + 3 = 0

I. 56x² - 99x + 40 = 0

II. 8y² - 30y + 25 = 0

I. 40 x² - 93 x + 54 = 0

II. 30 y² - 61 y + 30 = 0

I. x² + 91 = 20x

II. 10y² - 29y + 21 = 0

I. 5x² - 28x + 39 = 0

II. 2y² - 13y + 20 = 0

I. 2x² – 10x – 48 = 0

II. y² – 16y – 297 = 0

If x^2 - 7x + k = 0 has roots that are equal, what is the value of k?