Tīpoka ki ngā ihirangi matua
Whakaoti mō x (complex solution)
Tick mark Image
Whakaoti mō x
Tick mark Image
Graph

Ngā Raru Ōrite mai i te Rapu Tukutuku

Tohaina

x^{2}+4x=1
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}+4x-1=1-1
Me tango 1 mai i ngā taha e rua o te whārite.
x^{2}+4x-1=0
Mā te tango i te 1 i a ia ake anō ka toe ko te 0.
x=\frac{-4±\sqrt{4^{2}-4\left(-1\right)}}{2}
Kei te āhua arowhānui tēnei whārite: ax^{2}+bx+c=0. Me whakakapi 1 mō a, 4 mō b, me -1 mō c i te tikanga tātai pūrua, \frac{-b±\sqrt{b^{2}-4ac}}{2a}.
x=\frac{-4±\sqrt{16-4\left(-1\right)}}{2}
Pūrua 4.
x=\frac{-4±\sqrt{16+4}}{2}
Whakareatia -4 ki te -1.
x=\frac{-4±\sqrt{20}}{2}
Tāpiri 16 ki te 4.
x=\frac{-4±2\sqrt{5}}{2}
Tuhia te pūtakerua o te 20.
x=\frac{2\sqrt{5}-4}{2}
Nā, me whakaoti te whārite x=\frac{-4±2\sqrt{5}}{2} ina he tāpiri te ±. Tāpiri -4 ki te 2\sqrt{5}.
x=\sqrt{5}-2
Whakawehe -4+2\sqrt{5} ki te 2.
x=\frac{-2\sqrt{5}-4}{2}
Nā, me whakaoti te whārite x=\frac{-4±2\sqrt{5}}{2} ina he tango te ±. Tango 2\sqrt{5} mai i -4.
x=-\sqrt{5}-2
Whakawehe -4-2\sqrt{5} ki te 2.
x=\sqrt{5}-2 x=-\sqrt{5}-2
Kua oti te whārite te whakatau.
x^{2}+4x=1
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}+4x+2^{2}=1+2^{2}
Whakawehea te 4, te tau whakarea o te kīanga tau x, ki te 2 kia riro ai te 2. Nā, tāpiria te pūrua o te 2 ki ngā taha e rua o te whārite. Mā konei e pūrua tika tonu ai te taha mauī o te whārite.
x^{2}+4x+4=1+4
Pūrua 2.
x^{2}+4x+4=5
Tāpiri 1 ki te 4.
\left(x+2\right)^{2}=5
Tauwehea x^{2}+4x+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+2\right)^{2}}=\sqrt{5}
Tuhia te pūtakerua o ngā taha e rua o te whārite.
x+2=\sqrt{5} x+2=-\sqrt{5}
Whakarūnātia.
x=\sqrt{5}-2 x=-\sqrt{5}-2
Me tango 2 mai i ngā taha e rua o te whārite.
x^{2}+4x=1
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}+4x-1=1-1
Me tango 1 mai i ngā taha e rua o te whārite.
x^{2}+4x-1=0
Mā te tango i te 1 i a ia ake anō ka toe ko te 0.
x=\frac{-4±\sqrt{4^{2}-4\left(-1\right)}}{2}
Kei te āhua arowhānui tēnei whārite: ax^{2}+bx+c=0. Me whakakapi 1 mō a, 4 mō b, me -1 mō c i te tikanga tātai pūrua, \frac{-b±\sqrt{b^{2}-4ac}}{2a}.
x=\frac{-4±\sqrt{16-4\left(-1\right)}}{2}
Pūrua 4.
x=\frac{-4±\sqrt{16+4}}{2}
Whakareatia -4 ki te -1.
x=\frac{-4±\sqrt{20}}{2}
Tāpiri 16 ki te 4.
x=\frac{-4±2\sqrt{5}}{2}
Tuhia te pūtakerua o te 20.
x=\frac{2\sqrt{5}-4}{2}
Nā, me whakaoti te whārite x=\frac{-4±2\sqrt{5}}{2} ina he tāpiri te ±. Tāpiri -4 ki te 2\sqrt{5}.
x=\sqrt{5}-2
Whakawehe -4+2\sqrt{5} ki te 2.
x=\frac{-2\sqrt{5}-4}{2}
Nā, me whakaoti te whārite x=\frac{-4±2\sqrt{5}}{2} ina he tango te ±. Tango 2\sqrt{5} mai i -4.
x=-\sqrt{5}-2
Whakawehe -4-2\sqrt{5} ki te 2.
x=\sqrt{5}-2 x=-\sqrt{5}-2
Kua oti te whārite te whakatau.
x^{2}+4x=1
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}+4x+2^{2}=1+2^{2}
Whakawehea te 4, te tau whakarea o te kīanga tau x, ki te 2 kia riro ai te 2. Nā, tāpiria te pūrua o te 2 ki ngā taha e rua o te whārite. Mā konei e pūrua tika tonu ai te taha mauī o te whārite.
x^{2}+4x+4=1+4
Pūrua 2.
x^{2}+4x+4=5
Tāpiri 1 ki te 4.
\left(x+2\right)^{2}=5
Tauwehea x^{2}+4x+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+2\right)^{2}}=\sqrt{5}
Tuhia te pūtakerua o ngā taha e rua o te whārite.
x+2=\sqrt{5} x+2=-\sqrt{5}
Whakarūnātia.
x=\sqrt{5}-2 x=-\sqrt{5}-2
Me tango 2 mai i ngā taha e rua o te whārite.