Whakaoti i te (2s^2+6s)+(-4s-3)

$$( 2 s ^ { 2 } + 6 s ) + ( - 4 s - 3 )$$

Tauwehe

$$2\left(s-\frac{-\sqrt{7}-1}{2}\right)\left(s-\frac{\sqrt{7}-1}{2}\right)$$

Ngā Upane e Whakamahi ana i te Tikanga Tātai Pūrua

Pahekotia te 6s me -4s, ka 2s.

$$factor(2s^{2}+2s-3)$$

Ka taea te huamaha pūrua te tauwehe mā te whakamahi i te huringa ax^{2}+bx+c=a\left(x-x_{1}\right)\left(x-x_{2}\right), ina ko x_{1} me x_{2} ngā otinga o te whārite pūrua ax^{2}+bx+c=0.

$$2s^{2}+2s-3=0$$

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.

$$s=\frac{-2±\sqrt{2^{2}-4\times 2\left(-3\right)}}{2\times 2}$$

Pūrua 2.

$$s=\frac{-2±\sqrt{4-4\times 2\left(-3\right)}}{2\times 2}$$

Whakareatia -4 ki te 2.

$$s=\frac{-2±\sqrt{4-8\left(-3\right)}}{2\times 2}$$

Whakareatia -8 ki te -3.

$$s=\frac{-2±\sqrt{4+24}}{2\times 2}$$

Tāpiri 4 ki te 24.

$$s=\frac{-2±\sqrt{28}}{2\times 2}$$

Tuhia te pūtakerua o te 28.

$$s=\frac{-2±2\sqrt{7}}{2\times 2}$$

Whakareatia 2 ki te 2.

$$s=\frac{-2±2\sqrt{7}}{4}$$

Nā, me whakaoti te whārite s=\frac{-2±2\sqrt{7}}{4} ina he tāpiri te ±. Tāpiri -2 ki te 2\sqrt{7}.

$$s=\frac{2\sqrt{7}-2}{4}$$

Whakawehe -2+2\sqrt{7} ki te 4.

$$s=\frac{\sqrt{7}-1}{2}$$

Nā, me whakaoti te whārite s=\frac{-2±2\sqrt{7}}{4} ina he tango te ±. Tango 2\sqrt{7} mai i -2.

$$s=\frac{-2\sqrt{7}-2}{4}$$

Whakawehe -2-2\sqrt{7} ki te 4.

$$s=\frac{-\sqrt{7}-1}{2}$$

Tauwehea te kīanga taketake mā te whakamahi i te ax^{2}+bx+c=a\left(x-x_{1}\right)\left(x-x_{2}\right). Me whakakapi te \frac{-1+\sqrt{7}}{2} mō te x_{1} me te \frac{-1-\sqrt{7}}{2} mō te x_{2}.

$$2s^{2}+2s-3=2\left(s-\frac{\sqrt{7}-1}{2}\right)\left(s-\frac{-\sqrt{7}-1}{2}\right)$$

Aromātai

$$2s^{2}+2s-3$$

Ngā Upane Otinga

Pahekotia te 6s me -4s, ka 2s.

$$2s^{2}+2s-3$$