Whakaoti mō x
x=-4
x=0
Graph
Tohaina
Kua tāruatia ki te papatopenga
x\left(4+x\right)=0
Tauwehea te x.
x=0 x=-4
Hei kimi otinga whārite, me whakaoti te x=0 me te 4+x=0.
x^{2}+4x=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{-4±\sqrt{4^{2}}}{2}
Kei te āhua arowhānui tēnei whārite: ax^{2}+bx+c=0. Me whakakapi 1 mō a, 4 mō b, me 0 mō c i te tikanga tātai pūrua, \frac{-b±\sqrt{b^{2}-4ac}}{2a}.
x=\frac{-4±4}{2}
Tuhia te pūtakerua o te 4^{2}.
x=\frac{0}{2}
Nā, me whakaoti te whārite x=\frac{-4±4}{2} ina he tāpiri te ±. Tāpiri -4 ki te 4.
x=0
Whakawehe 0 ki te 2.
x=-\frac{8}{2}
Nā, me whakaoti te whārite x=\frac{-4±4}{2} ina he tango te ±. Tango 4 mai i -4.
x=-4
Whakawehe -8 ki te 2.
x=0 x=-4
Kua oti te whārite te whakatau.
x^{2}+4x=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}+4x+2^{2}=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=4
Pūrua 2.
\left(x+2\right)^{2}=4
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{4}
Tuhia te pūtakerua o ngā taha e rua o te whārite.
x+2=2 x+2=-2
Whakarūnātia.
x=0 x=-4
Me tango 2 mai i ngā taha e rua o te whārite.
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