I. 63x2+ 148x + 77 = 0
II. 21y2+ 89y + 88 = 0
I. 99x² + 161 x + 26 = 0
II. 26 y² + 161 y + 99 = 0
I. x ² + 5 x + 6 = 0
II. y²+ 7 y + 12= 0
...I. 6x2- 41x+13=0
II. 2y2- 19y+42=0
I. 2x² - 12x + 16 = 0
II. 4y² - 8y - 12 = 0
I. x + 1 = 3√ 9261
II. y + 1 = √ 324
I. 104x² + 9x - 35 = 0
II. 72y² - 85y + 25 = 0
I. 2(x+2)+ 2(-x)=5
II. (1/(y+1)+ 1/(y+5))=(1/(y+2)+ 1/(y+4))
I. 8x – 3y = 85
II. 4x – 5y = 67
I. x² - 208 = 233
II. y² + 47 - 371 = 0