Simplify the following expression: (2z – 5y)²

I. x² – 3(x + 5) = -11

II. y² – 4(y + 2) = -2y

I. 9/(4 )p + 7/8p = 21/12

II. 7/5p = 9/10q + 1/4

I. 10x² + 33x + 9 = 0

II. 2y² + 13y + 21 = 0

I. p² - 53p + 672 = 0

II. q² - 27q + 126  = 0

I. 8x² - 2x – 15 = 0

II. 12y² - 17y – 40 = 0

l).  2p² + 12p + 18 = 0 

ll).  3q² + 13q + 12 = 0

I. 63x² + 146x + 80 = 0

II. 42y² + 109y + 70 = 0

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

Equation 1: x² - 24x + 143 = 0

Equation 2: y² - 26y + 165 = 0

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

Equation 1: x² - 40x + 300 = 0

Equation 2: y² - 30y + 216 = 0

I. 2p² + 25p – 13 = 0

II. 2q² – 19q = 2q + 23