Whakaoti i te 2x^2+8=5

$$2 x ^ { 2 } + 8 = 5$$

Whakaoti mō x (complex solution)

$$x=-\frac{\sqrt{6}i}{2}\approx -0-1.224744871i$$

$$x=\frac{\sqrt{6}i}{2}\approx 1.224744871i$$

Ngā Upane mā te Kimi Pūtakerua

Tangohia te 8 mai i ngā taha e rua.

$$2x^{2}=5-8$$

Tangohia te 8 i te 5, ka -3.

$$2x^{2}=-3$$

Whakawehea ngā taha e rua ki te 2.

$$x^{2}=-\frac{3}{2}$$

Kua oti te whārite te whakatau.

$$x=\frac{\sqrt{6}i}{2} x=-\frac{\sqrt{6}i}{2}$$

Ngā Upane e Whakamahi ana i te Tikanga Tātai Pūrua

Tangohia te 5 mai i ngā taha e rua.

$$2x^{2}+8-5=0$$

Tangohia te 5 i te 8, ka 3.

$$2x^{2}+3=0$$

Kei te āhua arowhānui tēnei whārite: ax^{2}+bx+c=0. Me whakakapi 2 mō a, 0 mō b, me 3 mō c i te tikanga tātai pūrua, \frac{-b±\sqrt{b^{2}-4ac}}{2a}.

$$x=\frac{0±\sqrt{0^{2}-4\times 2\times 3}}{2\times 2}$$

Pūrua 0.

$$x=\frac{0±\sqrt{-4\times 2\times 3}}{2\times 2}$$

Whakareatia -4 ki te 2.

$$x=\frac{0±\sqrt{-8\times 3}}{2\times 2}$$

Whakareatia -8 ki te 3.

$$x=\frac{0±\sqrt{-24}}{2\times 2}$$

Tuhia te pūtakerua o te -24.

$$x=\frac{0±2\sqrt{6}i}{2\times 2}$$

Whakareatia 2 ki te 2.

$$x=\frac{0±2\sqrt{6}i}{4}$$

Nā, me whakaoti te whārite x=\frac{0±2\sqrt{6}i}{4} ina he tāpiri te ±.

$$x=\frac{\sqrt{6}i}{2}$$

Nā, me whakaoti te whārite x=\frac{0±2\sqrt{6}i}{4} ina he tango te ±.

$$x=-\frac{\sqrt{6}i}{2}$$

Kua oti te whārite te whakatau.

$$x=\frac{\sqrt{6}i}{2} x=-\frac{\sqrt{6}i}{2}$$