Whakaoti i te (x-2y)^2-(x-y)(x-y)-2y^2

$$( x - 2 y ) ^ { 2 } - ( x - y ) ( x - y ) - 2 y ^ { 2 }$$

Aromātai

$$y\left(y-2x\right)$$

Ngā Upane Otinga

Whakareatia te x-y ki te x-y, ka \left(x-y\right)^{2}.

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

Whakamahia te ture huarua \left(a-b\right)^{2}=a^{2}-2ab+b^{2} hei whakaroha \left(x-2y\right)^{2}.

$$x^{2}-4xy+4y^{2}-\left(x-y\right)^{2}-2y^{2}$$

Whakamahia te ture huarua \left(a-b\right)^{2}=a^{2}-2ab+b^{2} hei whakaroha \left(x-y\right)^{2}.

$$x^{2}-4xy+4y^{2}-\left(x^{2}-2xy+y^{2}\right)-2y^{2}$$

Hei kimi i te tauaro o x^{2}-2xy+y^{2}, kimihia te tauaro o ia taurangi.

$$x^{2}-4xy+4y^{2}-x^{2}+2xy-y^{2}-2y^{2}$$

Pahekotia te x^{2} me -x^{2}, ka 0.

$$-4xy+4y^{2}+2xy-y^{2}-2y^{2}$$

Pahekotia te -4xy me 2xy, ka -2xy.

$$-2xy+4y^{2}-y^{2}-2y^{2}$$

Pahekotia te 4y^{2} me -y^{2}, ka 3y^{2}.

$$-2xy+3y^{2}-2y^{2}$$

Pahekotia te 3y^{2} me -2y^{2}, ka y^{2}.

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

Whakaroha

$$y^{2}-2xy$$

Ngā Upane Otinga

Whakareatia te x-y ki te x-y, ka \left(x-y\right)^{2}.

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

Whakamahia te ture huarua \left(a-b\right)^{2}=a^{2}-2ab+b^{2} hei whakaroha \left(x-2y\right)^{2}.

$$x^{2}-4xy+4y^{2}-\left(x-y\right)^{2}-2y^{2}$$

Whakamahia te ture huarua \left(a-b\right)^{2}=a^{2}-2ab+b^{2} hei whakaroha \left(x-y\right)^{2}.

$$x^{2}-4xy+4y^{2}-\left(x^{2}-2xy+y^{2}\right)-2y^{2}$$

Hei kimi i te tauaro o x^{2}-2xy+y^{2}, kimihia te tauaro o ia taurangi.

$$x^{2}-4xy+4y^{2}-x^{2}+2xy-y^{2}-2y^{2}$$

Pahekotia te x^{2} me -x^{2}, ka 0.

$$-4xy+4y^{2}+2xy-y^{2}-2y^{2}$$

Pahekotia te -4xy me 2xy, ka -2xy.

$$-2xy+4y^{2}-y^{2}-2y^{2}$$

Pahekotia te 4y^{2} me -y^{2}, ka 3y^{2}.

$$-2xy+3y^{2}-2y^{2}$$

Pahekotia te 3y^{2} me -2y^{2}, ka y^{2}.

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