Odpowiedź:
x4 - 9x +20 = 0 | -20
x4 -(9*x)
x4 -9 *-x
-x5 - 9= -20 | +9
-x5=-11 | pierwiastek 5 stopnia
x = 1,6<x<1,7
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Odpowiedź:
x4 - 9x +20 = 0 | -20
x4 -(9*x)
x4 -9 *-x
-x5 - 9= -20 | +9
-x5=-11 | pierwiastek 5 stopnia
x = 1,6<x<1,7