Datrys ((2-3/9div3)^-2/94^2*frac{2/5})^-1

$$( \frac { ( 2 - \frac { 3 } { 9 } \div 3 ) ^ { - 2 } } { \frac { 9 } { 4 } ^ { 2 } \cdot \frac { 2 } { 5 } } ) ^ { - 1 }$$

Enrhifo

$$\frac{289}{40}=7.225$$

Camau Ateb

Mynegwch \frac{\frac{3}{9}}{3} fel ffracsiwn unigol.

$$\left(\frac{\left(2-\frac{3}{9\times 3}\right)^{-2}}{\left(\frac{9}{4}\right)^{2}\times \frac{2}{5}}\right)^{-1}$$

Lluosi 9 a 3 i gael 27.

$$\left(\frac{\left(2-\frac{3}{27}\right)^{-2}}{\left(\frac{9}{4}\right)^{2}\times \frac{2}{5}}\right)^{-1}$$

Lleihau'r ffracsiwn \frac{3}{27} i'r graddau lleiaf posib drwy dynnu a chanslo allan 3.

$$\left(\frac{\left(2-\frac{1}{9}\right)^{-2}}{\left(\frac{9}{4}\right)^{2}\times \frac{2}{5}}\right)^{-1}$$

Tynnu \frac{1}{9} o 2 i gael \frac{17}{9}.

$$\left(\frac{\left(\frac{17}{9}\right)^{-2}}{\left(\frac{9}{4}\right)^{2}\times \frac{2}{5}}\right)^{-1}$$

Cyfrifo \frac{17}{9} i bŵer -2 a chael \frac{81}{289}.

$$\left(\frac{\frac{81}{289}}{\left(\frac{9}{4}\right)^{2}\times \frac{2}{5}}\right)^{-1}$$

Cyfrifo \frac{9}{4} i bŵer 2 a chael \frac{81}{16}.

$$\left(\frac{\frac{81}{289}}{\frac{81}{16}\times \frac{2}{5}}\right)^{-1}$$

Lluosi \frac{81}{16} a \frac{2}{5} i gael \frac{81}{40}.

$$\left(\frac{\frac{81}{289}}{\frac{81}{40}}\right)^{-1}$$

Rhannwch \frac{81}{289} â \frac{81}{40} drwy luosi \frac{81}{289} â chilydd \frac{81}{40}.

$$\left(\frac{81}{289}\times \frac{40}{81}\right)^{-1}$$

Lluosi \frac{81}{289} a \frac{40}{81} i gael \frac{40}{289}.

$$\left(\frac{40}{289}\right)^{-1}$$

Cyfrifo \frac{40}{289} i bŵer -1 a chael \frac{289}{40}.

$$\frac{289}{40}$$

Ffactor

$$\frac{17 ^ {2}}{2 ^ {3} \cdot 5} = 7\frac{9}{40} = 7.225$$