Whakaoti i te y^2-2y+1

$$y ^ { 2 } - 2 y + 1$$

Tauwehe

$$\left(y-1\right)^{2}$$

Ngā Upane Otinga

Whakatauwehea te kīanga mā te whakarōpū. Tuatahi, me tuhi anō te kīanga hei y^{2}+ay+by+1. Hei kimi a me b, whakaritea tētahi pūnaha kia whakaoti.

$$a+b=-2 ab=1\times 1=1$$

I te mea kua tōrunga te ab, he ōrite te tohu o a me b. I te mea kua tōraro te a+b, he tōraro hoki a a me b. Ko te takirua anake pērā ko te otinga pūnaha.

$$a=-1 b=-1$$

Tuhia anō te y^{2}-2y+1 hei \left(y^{2}-y\right)+\left(-y+1\right).

$$\left(y^{2}-y\right)+\left(-y+1\right)$$

Tauwehea te y i te tuatahi me te -1 i te rōpū tuarua.

$$y\left(y-1\right)-\left(y-1\right)$$

Whakatauwehea atu te kīanga pātahi y-1 mā te whakamahi i te āhuatanga tātai tohatoha.

$$\left(y-1\right)\left(y-1\right)$$

Tuhia anōtia hei pūrua huarua.

$$\left(y-1\right)^{2}$$

Ngā Upane Whakamahi Tauwehe o te Pūrua Huarua

Ko te tikanga tātai o tēnei huatoru he pūrua huatoru, ka whakareatia pea e tētahi tauwehe pātahi. Ka taea ngā pūrua huatoru te tauwehe mā te kimi i ngā pūtakerua o ngā kīanga tau ārahi, autō hoki.

$$factor(y^{2}-2y+1)$$

Ko te pūrua huatoru te pūrua o te huarua ko te tapeke tērā, te huatango rānei o ngā pūtakerua o ngā kīanga tau ārahi, autō hoki, e whakaritea ai te tohu e te tohu o te kīanga tau waenga o te pūrua huatoru.

$$\left(y-1\right)^{2}$$

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.

$$y^{2}-2y+1=0$$

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.

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

Pūrua -2.

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

Tāpiri 4 ki te -4.

$$y=\frac{-\left(-2\right)±\sqrt{0}}{2}$$

Tuhia te pūtakerua o te 0.

$$y=\frac{-\left(-2\right)±0}{2}$$

Ko te tauaro o -2 ko 2.

$$y=\frac{2±0}{2}$$

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 1 mō te x_{1} me te 1 mō te x_{2}.

$$y^{2}-2y+1=\left(y-1\right)\left(y-1\right)$$

Aromātai

$$\left(y-1\right)^{2}$$