Datrys {l}{3200+300}{-2*40sqrt{2}}{*10sqrt{3}*frac{5sqrt{26}}{26}}

$$\left. \begin{array} { l } { 3200 + 300 } \\ { - 2 \times 40 \sqrt { 2 } } \\ { \times 10 \sqrt { 3 } \times \frac { 5 \sqrt { 26 } } { 26 } } \end{array} \right.$$

Enrhifo

$$-\frac{4000\sqrt{39}}{13}+3500\approx 1578.462154339$$

Camau Ateb

Adio 3200 a 300 i gael 3500.

$$3500-2\times 10\times 40\sqrt{2}\sqrt{3}\times \frac{5\sqrt{26}}{26}$$

Lluosi 2 a 10 i gael 20.

$$3500-20\times 40\sqrt{2}\sqrt{3}\times \frac{5\sqrt{26}}{26}$$

Lluosi 20 a 40 i gael 800.

$$3500-800\sqrt{2}\sqrt{3}\times \frac{5\sqrt{26}}{26}$$

Mynegwch 800\times \frac{5\sqrt{26}}{26} fel ffracsiwn unigol.

$$3500-\frac{800\times 5\sqrt{26}}{26}\sqrt{2}\sqrt{3}$$

I luosi \sqrt{2} a \sqrt{3}, dylid lluosi'r rhifau dan yr ail isradd.

$$3500-\frac{800\times 5\sqrt{26}}{26}\sqrt{6}$$

Lluosi 800 a 5 i gael 4000.

$$3500-\frac{4000\sqrt{26}}{26}\sqrt{6}$$

Rhannu 4000\sqrt{26} â 26 i gael \frac{2000}{13}\sqrt{26}.

$$3500-\frac{2000}{13}\sqrt{26}\sqrt{6}$$

I luosi \sqrt{26} a \sqrt{6}, dylid lluosi'r rhifau dan yr ail isradd.

$$3500-\frac{2000}{13}\sqrt{156}$$

Ffactora 156=2^{2}\times 39. Ailysgrifennu ail isradd y lluoswm \sqrt{2^{2}\times 39} fel lluoswm ail israddau \sqrt{2^{2}}\sqrt{39}. Cymryd isradd 2^{2}.

$$3500-\frac{2000}{13}\times 2\sqrt{39}$$

Mynegwch -\frac{2000}{13}\times 2 fel ffracsiwn unigol.

$$3500+\frac{-2000\times 2}{13}\sqrt{39}$$

Lluosi -2000 a 2 i gael -4000.

$$3500+\frac{-4000}{13}\sqrt{39}$$

Gellir ailysgrifennu \frac{-4000}{13} fel -\frac{4000}{13} drwy echdynnu’r arwydd negatif.

$$3500-\frac{4000}{13}\sqrt{39}$$

Ffactor

$$\frac{500 {(91 - 8 \sqrt{39})}}{13} = 1578.4621543389544$$