Whakaoti i te x^2+x-6=10

$$x ^ { 2 } + x - 6 = 10$$

Whakaoti mō x

$$x = \frac{\sqrt{65} - 1}{2} \approx 3.531128874$$

$$x=\frac{-\sqrt{65}-1}{2}\approx -4.531128874$$

Ngā Upane e Whakamahi ana i te Tikanga Tātai Pūrua

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.

$$x^{2}+x-6=10$$

Me tango 10 mai i ngā taha e rua o te whārite.

$$x^{2}+x-6-10=10-10$$

Mā te tango i te 10 i a ia ake anō ka toe ko te 0.

$$x^{2}+x-6-10=0$$

Tango 10 mai i -6.

$$x^{2}+x-16=0$$

Kei te āhua arowhānui tēnei whārite: ax^{2}+bx+c=0. Me whakakapi 1 mō a, 1 mō b, me -16 mō c i te tikanga tātai pūrua, \frac{-b±\sqrt{b^{2}-4ac}}{2a}.

$$x=\frac{-1±\sqrt{1^{2}-4\left(-16\right)}}{2}$$

Pūrua 1.

$$x=\frac{-1±\sqrt{1-4\left(-16\right)}}{2}$$

Whakareatia -4 ki te -16.

$$x=\frac{-1±\sqrt{1+64}}{2}$$

Tāpiri 1 ki te 64.

$$x=\frac{-1±\sqrt{65}}{2}$$

Nā, me whakaoti te whārite x=\frac{-1±\sqrt{65}}{2} ina he tāpiri te ±. Tāpiri -1 ki te \sqrt{65}.

$$x=\frac{\sqrt{65}-1}{2}$$

Nā, me whakaoti te whārite x=\frac{-1±\sqrt{65}}{2} ina he tango te ±. Tango \sqrt{65} mai i -1.

$$x=\frac{-\sqrt{65}-1}{2}$$

Kua oti te whārite te whakatau.

$$x=\frac{\sqrt{65}-1}{2} x=\frac{-\sqrt{65}-1}{2}$$

Ngā Upane mō te Whakaoti i te Pūrua

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.

$$x^{2}+x-6=10$$

Me tāpiri 6 ki ngā taha e rua o te whārite.

$$x^{2}+x-6-\left(-6\right)=10-\left(-6\right)$$

Mā te tango i te -6 i a ia ake anō ka toe ko te 0.

$$x^{2}+x=10-\left(-6\right)$$

Tango -6 mai i 10.

$$x^{2}+x=16$$

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.

$$x^{2}+x+\left(\frac{1}{2}\right)^{2}=16+\left(\frac{1}{2}\right)^{2}$$

Pūruatia \frac{1}{2} mā te pūrua i te taurunga me te tauraro o te hautanga.

$$x^{2}+x+\frac{1}{4}=16+\frac{1}{4}$$

Tāpiri 16 ki te \frac{1}{4}.

$$x^{2}+x+\frac{1}{4}=\frac{65}{4}$$

Tauwehea te x^{2}+x+\frac{1}{4}. Ko te tikanga, ina ko x^{2}+bx+c he pūrua tika, ka taea te tauwehe i ngā wā katoa hei \left(x+\frac{b}{2}\right)^{2}.

$$\left(x+\frac{1}{2}\right)^{2}=\frac{65}{4}$$

Tuhia te pūtakerua o ngā taha e rua o te whārite.

$$\sqrt{\left(x+\frac{1}{2}\right)^{2}}=\sqrt{\frac{65}{4}}$$

Whakarūnātia.

$$x+\frac{1}{2}=\frac{\sqrt{65}}{2} x+\frac{1}{2}=-\frac{\sqrt{65}}{2}$$

Me tango \frac{1}{2} mai i ngā taha e rua o te whārite.

$$x=\frac{\sqrt{65}-1}{2} x=\frac{-\sqrt{65}-1}{2}$$