What is “fossil fuel

I. x=  √(20+ √(20+ √(20+ √(20…………….∞)) ) ) 

II. y= √(5√(5√(5√(5……….∞)) ) ) 

I. x² + 13x + 42 = 0

II. y² + 13y + 40 = 0

I). p² + 22p + 72 = 0,

II). q² - 24q + 128 = 0

I.  p²= ∛1331

II. 2q²  - 21q + 55 = 0

I. 27x⁶-152x³+125=0

II. 216y⁶ -91y³+8=0

I. √(17x) + √51 = 0   

II. √(4y) + 3 = 0

I. x² - 5x - 14 = 0

II. y² - 16y + 64 = 0

Solve the quadratic equations and determine the relation between x and y:

Equation 1: 6x² - 24x + 18 = 0

Equation 2: 5y² - 20y + 15 = 0

I. 63x² + 146x + 80 = 0

II. 42y² + 109y + 70 = 0

I. x² - 33x + 270 = 0

II. y² - 41y + 414 = 0