Whakaoti i te 4+4a+a^2

$$4 + 4 a + a ^ { 2 }$$

Tauwehe

$$\left(a+2\right)^{2}$$

Ngā Upane Otinga

Hurinahatia te pūrau ki te āhua tānga ngahuru. Whakaraupapahia ngā kīanga tau mai i te pū teitei rawa ki te mea iti rawa.

$$a^{2}+4a+4$$

Whakatauwehea te kīanga mā te whakarōpū. Tuatahi, me tuhi anō te kīanga hei a^{2}+pa+qa+4. Hei kimi p me q, whakaritea tētahi pūnaha kia whakaoti.

$$p+q=4 pq=1\times 4=4$$

I te mea kua tōrunga te pq, he ōrite te tohu o p me q. I te mea kua tōrunga te p+q, he tōrunga hoki a p me q. Whakarārangitia ngā tau tōpū takirua pērā katoa ka hoatu i te hua 4.

$$1,4 2,2$$

Tātaihia te tapeke mō ia takirua.

$$1+4=5 2+2=4$$

Ko te otinga te takirua ka hoatu i te tapeke 4.

$$p=2 q=2$$

Tuhia anō te a^{2}+4a+4 hei \left(a^{2}+2a\right)+\left(2a+4\right).

$$\left(a^{2}+2a\right)+\left(2a+4\right)$$

Tauwehea te a i te tuatahi me te 2 i te rōpū tuarua.

$$a\left(a+2\right)+2\left(a+2\right)$$

Whakatauwehea atu te kīanga pātahi a+2 mā te whakamahi i te āhuatanga tātai tohatoha.

$$\left(a+2\right)\left(a+2\right)$$

Tuhia anōtia hei pūrua huarua.

$$\left(a+2\right)^{2}$$

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.

$$factor(a^{2}+4a+4)$$

Kimihia te pūtakerua o te kīanga tau autō, 4.

$$\sqrt{4}=2$$

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.

$$\left(a+2\right)^{2}$$

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.

$$a^{2}+4a+4=0$$

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.

$$a=\frac{-4±\sqrt{4^{2}-4\times 4}}{2}$$

Pūrua 4.

$$a=\frac{-4±\sqrt{16-4\times 4}}{2}$$

Whakareatia -4 ki te 4.

$$a=\frac{-4±\sqrt{16-16}}{2}$$

Tāpiri 16 ki te -16.

$$a=\frac{-4±\sqrt{0}}{2}$$

Tuhia te pūtakerua o te 0.

$$a=\frac{-4±0}{2}$$

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 -2 mō te x_{1} me te -2 mō te x_{2}.

$$a^{2}+4a+4=\left(a-\left(-2\right)\right)\left(a-\left(-2\right)\right)$$

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

$$a^{2}+4a+4=\left(a+2\right)\left(a+2\right)$$

Aromātai

$$\left(a+2\right)^{2}$$