Whakaoti i te y^2+2y-63=

$$y ^ { 2 } + 2 y - 63 =$$

Tauwehe

$$\left(y-7\right)\left(y+9\right)$$

Ngā Upane Otinga

Whakatauwehea te kīanga mā te whakarōpū. Tuatahi, me tuhi anō te kīanga hei y^{2}+ay+by-63. Hei kimi a me b, whakaritea tētahi pūnaha kia whakaoti.

$$a+b=2 ab=1\left(-63\right)=-63$$

I te mea kua tōraro te ab, he tauaro ngā tohu o a me b. I te mea kua tōrunga te a+b, he nui ake te uara pū o te tau tōrunga i tō te tōraro. Whakarārangitia ngā tau tōpū takirua pērā katoa ka hoatu i te hua -63.

$$-1,63 -3,21 -7,9$$

Tātaihia te tapeke mō ia takirua.

$$-1+63=62 -3+21=18 -7+9=2$$

Ko te otinga te takirua ka hoatu i te tapeke 2.

$$a=-7 b=9$$

Tuhia anō te y^{2}+2y-63 hei \left(y^{2}-7y\right)+\left(9y-63\right).

$$\left(y^{2}-7y\right)+\left(9y-63\right)$$

Tauwehea te y i te tuatahi me te 9 i te rōpū tuarua.

$$y\left(y-7\right)+9\left(y-7\right)$$

Whakatauwehea atu te kīanga pātahi y-7 mā te whakamahi i te āhuatanga tātai tohatoha.

$$\left(y-7\right)\left(y+9\right)$$

Ngā Upane e Whakamahi ana i te Tikanga Tātai Pūrua

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.

$$y^{2}+2y-63=0$$

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.

$$y=\frac{-2±\sqrt{2^{2}-4\left(-63\right)}}{2}$$

Pūrua 2.

$$y=\frac{-2±\sqrt{4-4\left(-63\right)}}{2}$$

Whakareatia -4 ki te -63.

$$y=\frac{-2±\sqrt{4+252}}{2}$$

Tāpiri 4 ki te 252.

$$y=\frac{-2±\sqrt{256}}{2}$$

Tuhia te pūtakerua o te 256.

$$y=\frac{-2±16}{2}$$

Nā, me whakaoti te whārite y=\frac{-2±16}{2} ina he tāpiri te ±. Tāpiri -2 ki te 16.

$$y=\frac{14}{2}$$

Whakawehe 14 ki te 2.

$$y=7$$

Nā, me whakaoti te whārite y=\frac{-2±16}{2} ina he tango te ±. Tango 16 mai i -2.

$$y=-\frac{18}{2}$$

Whakawehe -18 ki te 2.

$$y=-9$$

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 7 mō te x_{1} me te -9 mō te x_{2}.

$$y^{2}+2y-63=\left(y-7\right)\left(y-\left(-9\right)\right)$$

Whakamāmātia ngā kīanga katoa o te āhua p-\left(-q\right) ki te p+q.

$$y^{2}+2y-63=\left(y-7\right)\left(y+9\right)$$

Aromātai

$$\left(y-7\right)\left(y+9\right)$$