x2/(x+3) - 2x/(x-1,5) = 0 | +2x/(x-1,5)
x2/(x+3) = 2x/(x-1,5) | * (x-1,5)
x2 * (x-1,5) / (x + 3) = 2x | * (x + 3)
x2 * (x-1,5) = 2x2 + 6x
x3 - 1,5x2 = 2x2 + 6x | x ausklammern
x * (x2 - 1,5x) = x * (2x + 6)
x1 = 0
x2 - 1,5x = 2x + 6
x2 - 3,5x - 6 = 0 | pq-Formel
x2,3 = 1,75 ± √(3,0625+6)
x2 = 1,75 + √9,0625
x3 = 1,75 - √9,0625
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