Whakaoti i te 2left(5n+1right)left(4n-4/5right)

$$2 \left( 5n+1 \right) \left( 4n- \frac{ 4 }{ 5 } \right)$$

Aromātai

$$40n^{2}-\frac{8}{5}$$

Ngā Upane Otinga

Whakamahia te āhuatanga tohatoha hei whakarea te 2 ki te 5n+1.

$$\left(10n+2\right)\left(4n-\frac{4}{5}\right)$$

Me hoatu te āhuatanga tohatoha mā te whakarea ia tau o 10n+2 ki ia tau o 4n-\frac{4}{5}.

$$40n^{2}+10n\left(-\frac{4}{5}\right)+8n+2\left(-\frac{4}{5}\right)$$

Tuhia te 10\left(-\frac{4}{5}\right) hei hautanga kotahi.

$$40n^{2}+\frac{10\left(-4\right)}{5}n+8n+2\left(-\frac{4}{5}\right)$$

Whakareatia te 10 ki te -4, ka -40.

$$40n^{2}+\frac{-40}{5}n+8n+2\left(-\frac{4}{5}\right)$$

Whakawehea te -40 ki te 5, kia riro ko -8.

$$40n^{2}-8n+8n+2\left(-\frac{4}{5}\right)$$

Pahekotia te -8n me 8n, ka 0.

$$40n^{2}+2\left(-\frac{4}{5}\right)$$

Tuhia te 2\left(-\frac{4}{5}\right) hei hautanga kotahi.

$$40n^{2}+\frac{2\left(-4\right)}{5}$$

Whakareatia te 2 ki te -4, ka -8.

$$40n^{2}+\frac{-8}{5}$$

Ka taea te hautanga \frac{-8}{5} te tuhi anō ko -\frac{8}{5} mā te tango i te tohu tōraro.

$$40n^{2}-\frac{8}{5}$$

Whakaroha

$$40n^{2}-\frac{8}{5}$$

Ngā Upane Otinga

Whakamahia te āhuatanga tohatoha hei whakarea te 2 ki te 5n+1.

$$\left(10n+2\right)\left(4n-\frac{4}{5}\right)$$

Me hoatu te āhuatanga tohatoha mā te whakarea ia tau o 10n+2 ki ia tau o 4n-\frac{4}{5}.

$$40n^{2}+10n\left(-\frac{4}{5}\right)+8n+2\left(-\frac{4}{5}\right)$$

Tuhia te 10\left(-\frac{4}{5}\right) hei hautanga kotahi.

$$40n^{2}+\frac{10\left(-4\right)}{5}n+8n+2\left(-\frac{4}{5}\right)$$

Whakareatia te 10 ki te -4, ka -40.

$$40n^{2}+\frac{-40}{5}n+8n+2\left(-\frac{4}{5}\right)$$

Whakawehea te -40 ki te 5, kia riro ko -8.

$$40n^{2}-8n+8n+2\left(-\frac{4}{5}\right)$$

Pahekotia te -8n me 8n, ka 0.

$$40n^{2}+2\left(-\frac{4}{5}\right)$$

Tuhia te 2\left(-\frac{4}{5}\right) hei hautanga kotahi.

$$40n^{2}+\frac{2\left(-4\right)}{5}$$

Whakareatia te 2 ki te -4, ka -8.

$$40n^{2}+\frac{-8}{5}$$

Ka taea te hautanga \frac{-8}{5} te tuhi anō ko -\frac{8}{5} mā te tango i te tohu tōraro.

$$40n^{2}-\frac{8}{5}$$