2 + √(- 9/25·x^2 + 54/25·x + 144/25) = 1.6·x^2 - 6.4·x + 4.4
√(- 9/25·x^2 + 54/25·x + 144/25) = 8/5·x^2 - 32/5·x + 12/5
- 9/25·x^2 + 54/25·x + 144/25 = 64/25·x^4 - 512/25·x^3 + 1216/25·x^2 - 768/25·x + 144/25
- 9·x^2 + 54·x + 144 = 64·x^4 - 512·x^3 + 1216·x^2 - 768·x + 144
64·x^4 - 512·x^3 + 1225·x^2 - 822·x = 0
x = 0
64·x^3 - 512·x^2 + 1225·x - 822 = 0
x = 4.081022039 und [x = 2.791599245 ∨ x = 1.127378715]
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