Whakaoti i te {l}{-y=8x^3-2x^2-7x+3}{x=0.713557}

$$\left. \begin{array}{l}{ - y = 8 x ^ { 3 } - 2 x ^ { 2 } - 7 x + 3 }\\{ x = 0.713557 }\end{array} \right.$$

Whakaoti mō y, x

$$x=0.713557$$

$$y=0.106688221342642456$$

Ngā Upane Otinga

Whakaarohia te whārite tuatahi. Me kōkuhu ngā uara tāupe mōhiotia ki te whārite.

$$-y=8\times 0.713557^{3}-2\times 0.713557^{2}-7\times 0.713557+3$$

Tātaihia te 0.713557 mā te pū o 3, kia riro ko 0.363317245394419693.

$$-y=8\times 0.363317245394419693-2\times 0.713557^{2}-7\times 0.713557+3$$

Whakareatia te 8 ki te 0.363317245394419693, ka 2.906537963155357544.

$$-y=2.906537963155357544-2\times 0.713557^{2}-7\times 0.713557+3$$

Tātaihia te 0.713557 mā te pū o 2, kia riro ko 0.509163592249.

$$-y=2.906537963155357544-2\times 0.509163592249-7\times 0.713557+3$$

Whakareatia te -2 ki te 0.509163592249, ka -1.018327184498.

$$-y=2.906537963155357544-1.018327184498-7\times 0.713557+3$$

Tangohia te 1.018327184498 i te 2.906537963155357544, ka 1.888210778657357544.

$$-y=1.888210778657357544-7\times 0.713557+3$$

Whakareatia te -7 ki te 0.713557, ka -4.994899.

$$-y=1.888210778657357544-4.994899+3$$

Tangohia te 4.994899 i te 1.888210778657357544, ka -3.106688221342642456.

$$-y=-3.106688221342642456+3$$

Tāpirihia te -3.106688221342642456 ki te 3, ka -0.106688221342642456.

$$-y=-0.106688221342642456$$

Whakawehea ngā taha e rua ki te -1.

$$y=\frac{-0.106688221342642456}{-1}$$

Whakarohaina te \frac{-0.106688221342642456}{-1} mā te whakarea i te taurunga me te tauraro ki te 1000000000000000000.

$$y=\frac{-106688221342642456}{-1000000000000000000}$$

Whakahekea te hautanga \frac{-106688221342642456}{-1000000000000000000} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te -8.

$$y=\frac{13336027667830307}{125000000000000000}$$

Kua oti te pūnaha te whakatau.

$$y=\frac{13336027667830307}{125000000000000000} x=0.713557$$