Convexity in bonds

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

II. y= √(5√(5√(5√(5……….∞)) ) ) 

I). 5p²  - p - 4 = 0

II). q² - 12q + 27 = 0

I. 17x² - 26x – 16 = 0

II. 17y²- 26y + 9 = 0

I. 3p²  + 13p + 14 = 0

II. 8q²  + 26q + 21 = 0

I.8^(x+3)+ 8^(-x)=72 

II. 5^(y+5)+ 5^(-x)=150 

I. x ² + 5 x  + 6 = 0                 

II. y²+ 7 y  + 12= 0

I. (2x-3)³+  1/((2x-3)³)=2 

II.   4y²+(y+8)^2= 157

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

Equation 1: x² - 21x + 110 = 0

Equation 2: y² - 23y + 132 = 0

I. 20x² - 93x + 108 = 0

II.72y² - 47y - 144 = 0

Solve the system:

3x + 2y = 16

4x − y = 9