1/x - 11x + 18 = 0
1 - 11x² + 18x = 0
-11x² + 18x + 1 = 0
11x² - 18x - 1 = 0
Δ = (18)² - 4(11)(-1)
Δ = 324 + 44 = 368
Considerando raiz quadrada de 368 aproximadamente = 19
x1 = 18 + 19 / 2(11)
x1= 37/22
------
x2 = 18 - 19 / 2(11)
x2 = -1/22
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1/x - 11x + 18 = 0
1 - 11x² + 18x = 0
-11x² + 18x + 1 = 0
11x² - 18x - 1 = 0
Δ = (18)² - 4(11)(-1)
Δ = 324 + 44 = 368
Considerando raiz quadrada de 368 aproximadamente = 19
x1 = 18 + 19 / 2(11)
x1= 37/22
------
x2 = 18 - 19 / 2(11)
x2 = -1/22