)
- X^2 - 2X + 8 = 0
D = 4-4*(-1)*8 = 4 + 32 = 36 V D = 6
X1 = 2 + 6 \ - 2= - 4
X2 = 2 - 6 \ - 2 = 2
2)
X^3 - 7X - 6 = 0
F' = 3X^2 - 7
3X^2 = 7
X^2 = 7\3
X = V 7\3
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Answers & Comments
)
- X^2 - 2X + 8 = 0
D = 4-4*(-1)*8 = 4 + 32 = 36 V D = 6
X1 = 2 + 6 \ - 2= - 4
X2 = 2 - 6 \ - 2 = 2
2)
X^3 - 7X - 6 = 0
F' = 3X^2 - 7
3X^2 = 7
X^2 = 7\3
X = V 7\3