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I. 10x2 + 33x + 9 = 0
II. 2y2 + 13y + 21 = 0
I. x2 + 13x + 42 = 0
II. y² + 13y + 40 = 0
(i) x² – 3x – 40 = 0
(ii) y² + 11y + 30 = 0
I. 6 y² + 11 y – 7= 0
II. 21 x² + 5 x – 6 = 0
I. 2b2- 37b + 143 = 0
II. 2a2+ 15a - 143 = 0
I. 64x2 - 64x + 15 = 0
II. 21y2 - 13y + 2 =0
I. 99x² + 161 x + 26 = 0
II. 26 y² + 161 y + 99 = 0
I. x² - (16)2 = 0
II. 2y - 14 = 0
I. 3x2 – 17x + 10 = 0
II. y2 – 17y + 52 = 0
I. 63x² + 37 x – 40 = 0
II. 15 y² + 29 y + 12 = 0