Whakaoti i te {r}{3x-4y=-1}{x-6y=-5}

$$\left\{ \begin{array} { r } { 3 x - 4 y = - 1 } \\ { x - 6 y = - 5 } \end{array} \right.$$

Whakaoti mō x, y

$$x=1$$

$$y=1$$

Ngā Upane e Whakamahi ana i te Whakakapinga

Hei whakaoti i ētahi whārite takirua mā te whakakapinga, me whakaoti tētahi whārite i te tuatahi mō tētahi o ngā taurangi. Ka whakakapi i te otinga mō taua taurangi ki tērā o ngā whārite.

$$3x-4y=-1,x-6y=-5$$

Kōwhiria tētahi o ngā whārite ka whakaotia mō te x mā te wehe i te x i te taha mauī o te tohu ōrite.

$$3x-4y=-1$$

Me tāpiri 4y ki ngā taha e rua o te whārite.

$$3x=4y-1$$

Whakawehea ngā taha e rua ki te 3.

$$x=\frac{1}{3}\left(4y-1\right)$$

Whakareatia \frac{1}{3} ki te 4y-1.

$$x=\frac{4}{3}y-\frac{1}{3}$$

Whakakapia te \frac{4y-1}{3} mō te x ki tērā atu whārite, x-6y=-5.

$$\frac{4}{3}y-\frac{1}{3}-6y=-5$$

Tāpiri \frac{4y}{3} ki te -6y.

$$-\frac{14}{3}y-\frac{1}{3}=-5$$

Me tāpiri \frac{1}{3} ki ngā taha e rua o te whārite.

$$-\frac{14}{3}y=-\frac{14}{3}$$

Whakawehea ngā taha e rua o te whārite ki te -\frac{14}{3}, he ōrite ki te whakarea i ngā taha e rua ki te tau huripoki o te hautanga.

$$y=1$$

Whakaurua te 1 mō y ki x=\frac{4}{3}y-\frac{1}{3}. I te mea kotahi anake te taurangi kei te whārite i puta, ka taea e koe te whakaoti mō x hāngai tonu.

$$x=\frac{4-1}{3}$$

Tāpiri -\frac{1}{3} ki te \frac{4}{3} mā te kimi i te tauraro pātahi me te tāpiri i ngā taurunga. Ka whakaiti i te hautanga ki ngā kīanga tau iti rawa e taea ana.

$$x=1$$

Kua oti te pūnaha te whakatau.

$$x=1,y=1$$

Ngā Upane e Whakamahi ana i Ngā Poukapa

Tuhia ngā whārite ki te tānga ngahuru ka whakamahi i ngā poukapa hei whakaoti i te pūnaha o ngā whārite.

$$3x-4y=-1,x-6y=-5$$

Tuhia ngā whārite ki te tikanga tātai poukapa.

$$\left(\begin{matrix}3&-4\\1&-6\end{matrix}\right)\left(\begin{matrix}x\\y\end{matrix}\right)=\left(\begin{matrix}-1\\-5\end{matrix}\right)$$

Whakarea mauī i te whārite ki te poukapa kōaro o \left(\begin{matrix}3&-4\\1&-6\end{matrix}\right).

$$inverse(\left(\begin{matrix}3&-4\\1&-6\end{matrix}\right))\left(\begin{matrix}3&-4\\1&-6\end{matrix}\right)\left(\begin{matrix}x\\y\end{matrix}\right)=inverse(\left(\begin{matrix}3&-4\\1&-6\end{matrix}\right))\left(\begin{matrix}-1\\-5\end{matrix}\right)$$

Ko te hua o tētahi poukapa me te kōaro ko te poukapa tuakiri.

$$\left(\begin{matrix}1&0\\0&1\end{matrix}\right)\left(\begin{matrix}x\\y\end{matrix}\right)=inverse(\left(\begin{matrix}3&-4\\1&-6\end{matrix}\right))\left(\begin{matrix}-1\\-5\end{matrix}\right)$$

Whakareatia ngā poukapa kei te taha mauī o te tohu ōrite.

$$\left(\begin{matrix}x\\y\end{matrix}\right)=inverse(\left(\begin{matrix}3&-4\\1&-6\end{matrix}\right))\left(\begin{matrix}-1\\-5\end{matrix}\right)$$

Mō te poukapa 2\times 2 \left(\begin{matrix}a&b\\c&d\end{matrix}\right), ko te \left(\begin{matrix}\frac{d}{ad-bc}&\frac{-b}{ad-bc}\\\frac{-c}{ad-bc}&\frac{a}{ad-bc}\end{matrix}\right) te poukapa kōaro, nō reira ka taea te tuhi anō te whārite poukapa hei rapanga whakarea poukapa.

$$\left(\begin{matrix}x\\y\end{matrix}\right)=\left(\begin{matrix}-\frac{6}{3\left(-6\right)-\left(-4\right)}&-\frac{-4}{3\left(-6\right)-\left(-4\right)}\\-\frac{1}{3\left(-6\right)-\left(-4\right)}&\frac{3}{3\left(-6\right)-\left(-4\right)}\end{matrix}\right)\left(\begin{matrix}-1\\-5\end{matrix}\right)$$

Mahia ngā tātaitanga.

$$\left(\begin{matrix}x\\y\end{matrix}\right)=\left(\begin{matrix}\frac{3}{7}&-\frac{2}{7}\\\frac{1}{14}&-\frac{3}{14}\end{matrix}\right)\left(\begin{matrix}-1\\-5\end{matrix}\right)$$

Whakareatia ngā poukapa.

$$\left(\begin{matrix}x\\y\end{matrix}\right)=\left(\begin{matrix}\frac{3}{7}\left(-1\right)-\frac{2}{7}\left(-5\right)\\\frac{1}{14}\left(-1\right)-\frac{3}{14}\left(-5\right)\end{matrix}\right)$$

Mahia ngā tātaitanga.

$$\left(\begin{matrix}x\\y\end{matrix}\right)=\left(\begin{matrix}1\\1\end{matrix}\right)$$

Tangohia ngā huānga poukapa x me y.

$$x=1,y=1$$

Ngā Upane e Whakamahi i te Tangohanga

Hei whakaoti mā te tangohanga, ko ngā tau whakarea o tētahi o ngā taurangi me mātua ōrite i ngā whārite e rua kia whakakorehia ai te taurangi ina tangohia tētahi whārite mai i tētahi atu.

$$3x-4y=-1,x-6y=-5$$

Kia ōrite ai a 3x me x, whakareatia ngā kīanga tau katoa kei ia taha o te whārite tuatahi ki te 1 me ngā kīanga tau katoa kei ia taha o te whārite tuarua ki te 3.

$$3x-4y=-1,3x+3\left(-6\right)y=3\left(-5\right)$$

Whakarūnātia.

$$3x-4y=-1,3x-18y=-15$$

Me tango 3x-18y=-15 mai i 3x-4y=-1 mā te tango i ngā kīanga tau ōrite i ia taha o te tohu ōrite.

$$3x-3x-4y+18y=-1+15$$

Tāpiri 3x ki te -3x. Ka whakakore atu ngā kupu 3x me -3x, ka toe he whārite me tētahi taurangi kotahi ka taea te whakaoti.

$$-4y+18y=-1+15$$

Tāpiri -4y ki te 18y.

$$14y=-1+15$$

Tāpiri -1 ki te 15.

$$14y=14$$

Whakawehea ngā taha e rua ki te 14.

$$y=1$$

Whakaurua te 1 mō y ki x-6y=-5. I te mea kotahi anake te taurangi kei te whārite i puta, ka taea e koe te whakaoti mō x hāngai tonu.

$$x-6=-5$$

Me tāpiri 6 ki ngā taha e rua o te whārite.

$$x=1$$

Kua oti te pūnaha te whakatau.

$$x=1,y=1$$