Datrys 628*5^(-9)sqrt{6*4700^2+4*4700^2}

$$628 \times 5 ^ { ( - 9 ) } \sqrt { 6 \times 4700 ^ { 2 } + 4 \times 4700 ^ { 2 } }$$

Enrhifo

$$\frac{118064\sqrt{10}}{78125}\approx 4.778894716$$

Camau Ateb

Cyfrifo 5 i bŵer -9 a chael \frac{1}{1953125}.

$$628\times \frac{1}{1953125}\sqrt{6\times 4700^{2}+4\times 4700^{2}}$$

Lluosi 628 a \frac{1}{1953125} i gael \frac{628}{1953125}.

$$\frac{628}{1953125}\sqrt{6\times 4700^{2}+4\times 4700^{2}}$$

Cyfrifo 4700 i bŵer 2 a chael 22090000.

$$\frac{628}{1953125}\sqrt{6\times 22090000+4\times 4700^{2}}$$

Lluosi 6 a 22090000 i gael 132540000.

$$\frac{628}{1953125}\sqrt{132540000+4\times 4700^{2}}$$

Cyfrifo 4700 i bŵer 2 a chael 22090000.

$$\frac{628}{1953125}\sqrt{132540000+4\times 22090000}$$

Lluosi 4 a 22090000 i gael 88360000.

$$\frac{628}{1953125}\sqrt{132540000+88360000}$$

Adio 132540000 a 88360000 i gael 220900000.

$$\frac{628}{1953125}\sqrt{220900000}$$

Ffactora 220900000=4700^{2}\times 10. Ailysgrifennu ail isradd y lluoswm \sqrt{4700^{2}\times 10} fel lluoswm ail israddau \sqrt{4700^{2}}\sqrt{10}. Cymryd isradd 4700^{2}.

$$\frac{628}{1953125}\times 4700\sqrt{10}$$

Lluosi \frac{628}{1953125} a 4700 i gael \frac{118064}{78125}.

$$\frac{118064}{78125}\sqrt{10}$$