Whakaoti i te 1/10left(left(9-83right)^2*2+left(8-83right)^2*6+left(10-83right)^2+left(7-83right)^2right)

$$\frac{ 1 }{ 10 } \left( { \left(9-83 \right) }^{ 2 } \times 2+ { \left(8-83 \right) }^{ 2 } \times 6+ { \left(10-83 \right) }^{ 2 } + { \left(7-83 \right) }^{ 2 } \right)$$

Aromātai

$$\frac{55807}{10}=5580.7$$

Ngā Upane Otinga

Tangohia te 83 i te 9, ka -74.

$$\frac{1}{10}\left(\left(-74\right)^{2}\times 2+\left(8-83\right)^{2}\times 6+\left(10-83\right)^{2}+\left(7-83\right)^{2}\right)$$

Tātaihia te -74 mā te pū o 2, kia riro ko 5476.

$$\frac{1}{10}\left(5476\times 2+\left(8-83\right)^{2}\times 6+\left(10-83\right)^{2}+\left(7-83\right)^{2}\right)$$

Whakareatia te 5476 ki te 2, ka 10952.

$$\frac{1}{10}\left(10952+\left(8-83\right)^{2}\times 6+\left(10-83\right)^{2}+\left(7-83\right)^{2}\right)$$

Tangohia te 83 i te 8, ka -75.

$$\frac{1}{10}\left(10952+\left(-75\right)^{2}\times 6+\left(10-83\right)^{2}+\left(7-83\right)^{2}\right)$$

Tātaihia te -75 mā te pū o 2, kia riro ko 5625.

$$\frac{1}{10}\left(10952+5625\times 6+\left(10-83\right)^{2}+\left(7-83\right)^{2}\right)$$

Whakareatia te 5625 ki te 6, ka 33750.

$$\frac{1}{10}\left(10952+33750+\left(10-83\right)^{2}+\left(7-83\right)^{2}\right)$$

Tāpirihia te 10952 ki te 33750, ka 44702.

$$\frac{1}{10}\left(44702+\left(10-83\right)^{2}+\left(7-83\right)^{2}\right)$$

Tangohia te 83 i te 10, ka -73.

$$\frac{1}{10}\left(44702+\left(-73\right)^{2}+\left(7-83\right)^{2}\right)$$

Tātaihia te -73 mā te pū o 2, kia riro ko 5329.

$$\frac{1}{10}\left(44702+5329+\left(7-83\right)^{2}\right)$$

Tāpirihia te 44702 ki te 5329, ka 50031.

$$\frac{1}{10}\left(50031+\left(7-83\right)^{2}\right)$$

Tangohia te 83 i te 7, ka -76.

$$\frac{1}{10}\left(50031+\left(-76\right)^{2}\right)$$

Tātaihia te -76 mā te pū o 2, kia riro ko 5776.

$$\frac{1}{10}\left(50031+5776\right)$$

Tāpirihia te 50031 ki te 5776, ka 55807.

$$\frac{1}{10}\times 55807$$

Whakareatia te \frac{1}{10} ki te 55807, ka \frac{55807}{10}.

$$\frac{55807}{10}$$

Tauwehe

$$\frac{55807}{2 \cdot 5} = 5580\frac{7}{10} = 5580.7$$