A photosynthetic unit

I. x² - 4x – 21 = 0

II. y² + 12y + 20 = 0

I. 2x² - 5x - 33 =0

II. 2y² + 5y - 25 = 0

I. 2x² + 15 x - 27 = 0

II. 3 y² + 25 y - 18 = 0

I. 3x² = 2x² + 9x – 20

II. 3y² = 75

I. x²-2x- √5x+2√5 = 0

II. y²-√3 y- √2 y+ √6 = 0

Solve the equation:-  x² − 9x + 20 = 0,  What is the larger root?

I. x² - 17x + 70 = 0

II. y² - 11y + 28 = 0

I. 15b² + 26b + 8 = 0

II. 20a² + 7a - 6 = 0

What is the average salary of 10 officers , if a clerk’s salary is Rs. 15,000?

I. 12y² + 11y – 15 = 0

II. 8x² – 6x – 5 = 0