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Beantwortet: Brauche Hilfe bei dieser Aufgabe bitte! x=?

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(4·x + 20)·(2·x - 8) + 12 = 5·x^2 + (3·x - 2)·(x + 80)

(8·x^2 + 8·x - 160) + 12 = 5·x^2 + (3·x^2 + 238·x - 160)

8·x^2 + 8·x - 148 = 8·x^2 + 238·x - 160

12 = 230·x

x = 12/230  = 6/115 = 0.05217


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