I. 2x² – 5x - 12 = 0

II. y² – 11y + 30 = 0

I. 4x² -  15x + 9 = 0

II. 20y² -  23y + 6 = 0

I. (y – 5)² – 9 = 0

II. x² – 3x + 2 = 0

I. 2y² - 11 y + 15 = 0

II. 2x² + 3x – 14 = 0

I. 63x² + 146x + 80 = 0

II. 42y² + 109y + 70 = 0

I. 8x² - 74x + 165 = 0

II. 15y² - 38y + 24 = 0

I. 2y²– 19y + 35 = 0

II. 4x²– 16x + 15 = 0

I. x ² + 5 x  + 6 = 0                 

II. y²+ 7 y  + 12= 0

I. p²+ 2p – 8 = 0 II. q² – 5q + 6 = 0

I. y/16 = 4/y

II. x³= (2 ÷ 50) × (2500 ÷ 50) × 4²× (192 ÷ 12)