Datrys 2(16/25)^2-1

$$2 ( \frac { 16 } { 25 } ) ^ { 2 } - 1$$

Enrhifo

$$-\frac{113}{625}=-0.1808$$

Camau Ateb

Cyfrifo \frac{16}{25} i bŵer 2 a chael \frac{256}{625}.

$$2\times \frac{256}{625}-1$$

Mynegwch 2\times \frac{256}{625} fel ffracsiwn unigol.

$$\frac{2\times 256}{625}-1$$

Lluosi 2 a 256 i gael 512.

$$\frac{512}{625}-1$$

Troswch y rhif degol 1 i’r ffracsiwn \frac{625}{625}.

$$\frac{512}{625}-\frac{625}{625}$$

Gan fod gan \frac{512}{625} a \frac{625}{625} yr un dynodydd, tynnwch nhw drwy dynnu eu rhifiaduron.

$$\frac{512-625}{625}$$

Tynnu 625 o 512 i gael -113.

$$-\frac{113}{625}$$

Ffactor

$$-\frac{113}{625} = -0.1808$$