Spot the grammatical errors in the given sentence. Mark

(i) x² – 3x – 40 = 0

(ii) y² + 11y + 30 = 0

I. 2y² - 15y + 18 = 0

II. 2x² + 9x - 18 = 0

I. 3x⁶- 19x³+16=0

II. 9y⁴- 27y²+20=0

I. 3q² -29q +18 = 0

II. 9p² - 4 = 0

I. 15/(√x)+9/(√x)=11√x

II. (√y)/4 + (5√y)/12 = 1/(√y)

I. 6x² + 37x + 45 = 0

II. 3y² - 11y + 6 = 0

I. 7x² + 52x + 21 = 0

II. 6y² + 7y - 24 = 0

I. 3x² + 3x - 60 = 0         

II. 2y² - 7y + 5 = 0 

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

Equation 1: 29x² - 137x + 108 = 0

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