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Whakaoti mō x (complex solution)
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x^{2}+6x+13=0
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=\frac{-6±\sqrt{6^{2}-4\times 13}}{2}
Kei te āhua arowhānui tēnei whārite: ax^{2}+bx+c=0. Me whakakapi 1 mō a, 6 mō b, me 13 mō c i te tikanga tātai pūrua, \frac{-b±\sqrt{b^{2}-4ac}}{2a}.
x=\frac{-6±\sqrt{36-4\times 13}}{2}
Pūrua 6.
x=\frac{-6±\sqrt{36-52}}{2}
Whakareatia -4 ki te 13.
x=\frac{-6±\sqrt{-16}}{2}
Tāpiri 36 ki te -52.
x=\frac{-6±4i}{2}
Tuhia te pūtakerua o te -16.
x=\frac{-6+4i}{2}
Nā, me whakaoti te whārite x=\frac{-6±4i}{2} ina he tāpiri te ±. Tāpiri -6 ki te 4i.
x=-3+2i
Whakawehe -6+4i ki te 2.
x=\frac{-6-4i}{2}
Nā, me whakaoti te whārite x=\frac{-6±4i}{2} ina he tango te ±. Tango 4i mai i -6.
x=-3-2i
Whakawehe -6-4i ki te 2.
x=-3+2i x=-3-2i
Kua oti te whārite te whakatau.
x^{2}+6x+13=0
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.
x^{2}+6x+13-13=-13
Me tango 13 mai i ngā taha e rua o te whārite.
x^{2}+6x=-13
Mā te tango i te 13 i a ia ake anō ka toe ko te 0.
x^{2}+6x+3^{2}=-13+3^{2}
Whakawehea te 6, te tau whakarea o te kīanga tau x, ki te 2 kia riro ai te 3. Nā, tāpiria te pūrua o te 3 ki ngā taha e rua o te whārite. Mā konei e pūrua tika tonu ai te taha mauī o te whārite.
x^{2}+6x+9=-13+9
Pūrua 3.
x^{2}+6x+9=-4
Tāpiri -13 ki te 9.
\left(x+3\right)^{2}=-4
Tauwehea x^{2}+6x+9. 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+3\right)^{2}}=\sqrt{-4}
Tuhia te pūtakerua o ngā taha e rua o te whārite.
x+3=2i x+3=-2i
Whakarūnātia.
x=-3+2i x=-3-2i
Me tango 3 mai i ngā taha e rua o te whārite.