Whakaoti mō x
x=-1
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Tohaina
Kua tāruatia ki te papatopenga
\left(x-1\right)x^{2}=x-1
Tē taea kia ōrite te tāupe x ki 1 nā te kore tautuhi i te whakawehenga mā te kore. Whakareatia ngā taha e rua o te whārite ki te x-1.
x^{3}-x^{2}=x-1
Whakamahia te āhuatanga tohatoha hei whakarea te x-1 ki te x^{2}.
x^{3}-x^{2}-x=-1
Tangohia te x mai i ngā taha e rua.
x^{3}-x^{2}-x+1=0
Me tāpiri te 1 ki ngā taha e rua.
±1
Tā te Rational Root Theorem, ko ngā pūtake whakahau katoa o tētahi pūrau kei te āhua o \frac{p}{q}, ina wehea e p te kīanga pūmau 1, ā, ka wehea e q te whakarea arahanga 1. Whakarārangitia ngā kaitono katoa \frac{p}{q}.
x=1
Kimihia tētahi pūtake pērā mā te whakamātau i ngā uara tau tōpū katoa, e tīmata ana i te mea iti rawa mā te uara pū. Mēnā kāore he pūtake tau tōpū e kitea, whakamātauria ngā hautanga.
x^{2}-1=0
Mā te whakatakotoranga Tauwehe, he tauwehe te x-k o te pūrau mō ia pūtake k. Whakawehea te x^{3}-x^{2}-x+1 ki te x-1, kia riro ko x^{2}-1. Whakaotihia te whārite ina ōrite te hua ki te 0.
x=\frac{0±\sqrt{0^{2}-4\times 1\left(-1\right)}}{2}
Ka taea ngā whārite katoa o te momo ax^{2}+bx+c=0 te whakaoti mā te ture pūrua: \frac{-b±\sqrt{b^{2}-4ac}}{2a}. Whakakapia te 1 mō te a, te 0 mō te b, me te -1 mō te c i te ture pūrua.
x=\frac{0±2}{2}
Mahia ngā tātaitai.
x=-1 x=1
Whakaotia te whārite x^{2}-1=0 ina he tōrunga te ±, ina he tōraro te ±.
x=-1
Tangohia ngā uara e kore e ōrite ki te taurangi.
x=1 x=-1
Rārangitia ngā otinga katoa i kitea.
x=-1
Tē taea kia ōrite te tāupe x ki 1.
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