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Whakaoti mō x (complex solution)
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-x^{2}+x=3
Ko ngā whārite katoa o te āhua ax^{2}+bx+c=0 ka taea te whakaoti mā te whakamahi i te tikanga tātai pūrua: \frac{-b±\sqrt{b^{2}-4ac}}{2a}. E rua ngā otinga ka puta i te tikanga tātai pūrua, ko tētahi ina he tāpiri a ±, ā, ko tētahi ina he tango.
-x^{2}+x-3=3-3
Me tango 3 mai i ngā taha e rua o te whārite.
-x^{2}+x-3=0
Mā te tango i te 3 i a ia ake anō ka toe ko te 0.
x=\frac{-1±\sqrt{1^{2}-4\left(-1\right)\left(-3\right)}}{2\left(-1\right)}
Kei te āhua arowhānui tēnei whārite: ax^{2}+bx+c=0. Me whakakapi -1 mō a, 1 mō b, me -3 mō c i te tikanga tātai pūrua, \frac{-b±\sqrt{b^{2}-4ac}}{2a}.
x=\frac{-1±\sqrt{1-4\left(-1\right)\left(-3\right)}}{2\left(-1\right)}
Pūrua 1.
x=\frac{-1±\sqrt{1+4\left(-3\right)}}{2\left(-1\right)}
Whakareatia -4 ki te -1.
x=\frac{-1±\sqrt{1-12}}{2\left(-1\right)}
Whakareatia 4 ki te -3.
x=\frac{-1±\sqrt{-11}}{2\left(-1\right)}
Tāpiri 1 ki te -12.
x=\frac{-1±\sqrt{11}i}{2\left(-1\right)}
Tuhia te pūtakerua o te -11.
x=\frac{-1±\sqrt{11}i}{-2}
Whakareatia 2 ki te -1.
x=\frac{-1+\sqrt{11}i}{-2}
Nā, me whakaoti te whārite x=\frac{-1±\sqrt{11}i}{-2} ina he tāpiri te ±. Tāpiri -1 ki te i\sqrt{11}.
x=\frac{-\sqrt{11}i+1}{2}
Whakawehe -1+i\sqrt{11} ki te -2.
x=\frac{-\sqrt{11}i-1}{-2}
Nā, me whakaoti te whārite x=\frac{-1±\sqrt{11}i}{-2} ina he tango te ±. Tango i\sqrt{11} mai i -1.
x=\frac{1+\sqrt{11}i}{2}
Whakawehe -1-i\sqrt{11} ki te -2.
x=\frac{-\sqrt{11}i+1}{2} x=\frac{1+\sqrt{11}i}{2}
Kua oti te whārite te whakatau.
-x^{2}+x=3
Ko ngā whārite pūrua pēnei i tēnei nā ka taea te whakaoti mā te whakaoti i te pūrua. Hei whakaoti i te pūrua, ko te whārite me mātua tuhi ki te āhua x^{2}+bx=c.
\frac{-x^{2}+x}{-1}=\frac{3}{-1}
Whakawehea ngā taha e rua ki te -1.
x^{2}+\frac{1}{-1}x=\frac{3}{-1}
Mā te whakawehe ki te -1 ka wetekia te whakareanga ki te -1.
x^{2}-x=\frac{3}{-1}
Whakawehe 1 ki te -1.
x^{2}-x=-3
Whakawehe 3 ki te -1.
x^{2}-x+\left(-\frac{1}{2}\right)^{2}=-3+\left(-\frac{1}{2}\right)^{2}
Whakawehea te -1, te tau whakarea o te kīanga tau x, ki te 2 kia riro ai te -\frac{1}{2}. Nā, tāpiria te pūrua o te -\frac{1}{2} ki ngā taha e rua o te whārite. Mā konei e pūrua tika tonu ai te taha mauī o te whārite.
x^{2}-x+\frac{1}{4}=-3+\frac{1}{4}
Pūruatia -\frac{1}{2} mā te pūrua i te taurunga me te tauraro o te hautanga.
x^{2}-x+\frac{1}{4}=-\frac{11}{4}
Tāpiri -3 ki te \frac{1}{4}.
\left(x-\frac{1}{2}\right)^{2}=-\frac{11}{4}
Tauwehea x^{2}-x+\frac{1}{4}. Ko te tikanga pūnoa, ina ko x^{2}+bx+c he pūrua tika pūrua tika pū, ka taea taua mea te tauwehea i ngā wā katoa hei \left(x+\frac{b}{2}\right)^{2}.
\sqrt{\left(x-\frac{1}{2}\right)^{2}}=\sqrt{-\frac{11}{4}}
Tuhia te pūtakerua o ngā taha e rua o te whārite.
x-\frac{1}{2}=\frac{\sqrt{11}i}{2} x-\frac{1}{2}=-\frac{\sqrt{11}i}{2}
Whakarūnātia.
x=\frac{1+\sqrt{11}i}{2} x=\frac{-\sqrt{11}i+1}{2}
Me tāpiri \frac{1}{2} ki ngā taha e rua o te whārite.