Datrys 7div2-[21div4div((2+5)*(25div8)div(5div2))^2]

$$7 \div 2 - [ 21 \div 4 \div ( ( 2 + 5 ) \times ( 25 \div 8 ) \div ( 5 \div 2 ) ) ^ { 2 } ]$$

Enrhifo

$$\frac{1201}{350}\approx 3.431428571$$

Camau Ateb

Adio 2 a 5 i gael 7.

$$\frac{7}{2}-\frac{\frac{21}{4}}{\left(\frac{7\times \frac{25}{8}}{\frac{5}{2}}\right)^{2}}$$

Lluosi 7 a \frac{25}{8} i gael \frac{175}{8}.

$$\frac{7}{2}-\frac{\frac{21}{4}}{\left(\frac{\frac{175}{8}}{\frac{5}{2}}\right)^{2}}$$

Rhannwch \frac{175}{8} â \frac{5}{2} drwy luosi \frac{175}{8} â chilydd \frac{5}{2}.

$$\frac{7}{2}-\frac{\frac{21}{4}}{\left(\frac{175}{8}\times \frac{2}{5}\right)^{2}}$$

Lluosi \frac{175}{8} a \frac{2}{5} i gael \frac{35}{4}.

$$\frac{7}{2}-\frac{\frac{21}{4}}{\left(\frac{35}{4}\right)^{2}}$$

Cyfrifo \frac{35}{4} i bŵer 2 a chael \frac{1225}{16}.

$$\frac{7}{2}-\frac{\frac{21}{4}}{\frac{1225}{16}}$$

Rhannwch \frac{21}{4} â \frac{1225}{16} drwy luosi \frac{21}{4} â chilydd \frac{1225}{16}.

$$\frac{7}{2}-\frac{21}{4}\times \frac{16}{1225}$$

Lluosi \frac{21}{4} a \frac{16}{1225} i gael \frac{12}{175}.

$$\frac{7}{2}-\frac{12}{175}$$

Tynnu \frac{12}{175} o \frac{7}{2} i gael \frac{1201}{350}.

$$\frac{1201}{350}$$

Ffactor

$$\frac{1201}{2 \cdot 5 ^ {2} \cdot 7} = 3\frac{151}{350} = 3.4314285714285715$$