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

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

Enrhifo

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

Camau Ateb

Tynnu 83 o 9 i gael -74.

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

Cyfrifo -74 i bŵer 2 a chael 5476.

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

Lluosi 5476 a 2 i gael 10952.

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

Tynnu 83 o 8 i gael -75.

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

Cyfrifo -75 i bŵer 2 a chael 5625.

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

Lluosi 5625 a 6 i gael 33750.

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

Adio 10952 a 33750 i gael 44702.

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

Tynnu 83 o 10 i gael -73.

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

Cyfrifo -73 i bŵer 2 a chael 5329.

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

Adio 44702 a 5329 i gael 50031.

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

Tynnu 83 o 7 i gael -76.

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

Cyfrifo -76 i bŵer 2 a chael 5776.

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

Adio 50031 a 5776 i gael 55807.

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

Lluosi \frac{1}{10} a 55807 i gael \frac{55807}{10}.

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

Ffactor

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