43. x2 - 2ax - (462 - a?) = 0
44. x2 - (26 - 1)x + (b2 – b – 20) = 0
45. x2 +6x - (a? + 2a - 8) = 0
46. abx+ (b2 - ac)x – bc = 0
47. x2 - 4ax - 62 +4a2 = 0
48. 4x2 – 2(a² +62)x+ a²b2 = 0
49. 12abx2 - (9a? – 862)x - 6ab = 0
50. a²b2x2 + b2x-a?x-1 = 0
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